CN108037716B - Redundancy design method of intelligent primary equipment IED device - Google Patents
Redundancy design method of intelligent primary equipment IED device Download PDFInfo
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Abstract
The invention discloses a redundancy design method of an intelligent primary equipment IED device, which belongs to the technical field of electric power, wherein a background system, a first IED device, a second IED device, a signal merging device and primary equipment in a transformer substation are established, so that the two sets of devices run simultaneously and are standby to each other, and the technical problem of redundancy control of a primary equipment body control cabinet is solved; the occurrence rate of faults is greatly reduced, the economic loss is reduced, and the efficiency and the accuracy of fault treatment are improved.
Description
Technical Field
The invention belongs to the technical field of electric power, and particularly relates to a redundancy design method of an intelligent primary equipment IED device.
Background
The primary equipment of the power grid mainly comprises a transformer and a circuit breaker, and the important primary equipment also has control functions such as body cooling control, gear regulation, SF6 leakage monitoring control and the like which are necessary for the operation of a body besides a conventional protection control system, and the control functions are usually designed and configured by a primary equipment manufacturer and are realized by adopting a local control cabinet. With the higher and higher voltage grade of the power transmission and transformation project, the extra-high voltage transformers and the circuit breakers are applied more and more, and the requirement on the reliability of the system is higher and higher. Because the extra-high voltage engineering protection control system has already realized the dual redundant configuration, and the IED device of the primary equipment body control cabinet has always adopted the single configuration, once the IED device has a fault, the primary equipment will exit the operation or enter the fault operation state, affecting the operation reliability of the whole system, so the redundant configuration of the IED device of the primary equipment control part also becomes the necessary function required by the design specification of the extra-high voltage transmission and transformation engineering.
As shown in fig. 1, a conventional primary equipment control unit of a control cubicle is configured by a single IED device, and simultaneously interacts information and control commands with two sets of background systems, which has three problems:
1. when the inside of the IED device breaks down, the device can only quit operation, and the normal operation of the body cannot be continuously guaranteed, so that the reliability of the system operation is influenced; 2. when peripheral wiring or communication of the IED device fails, the device cannot be aware of the failure and only can continue to operate with a fault, so that the reliability of system operation is influenced; 3. the extra-high voltage project has high equipment load and voltage level, the operating environment of the body control cabinet is severe, high requirements are provided for the design reliability of the IED device, and the reliability design difficulty and the cost of a single device are improved.
Disclosure of Invention
The invention aims to provide a redundancy design method of an intelligent primary equipment IED device, and solves the technical problem of redundancy control of a primary equipment body control cabinet.
In order to achieve the purpose, the invention adopts the following technical scheme:
the redundancy design method of the intelligent primary equipment IED device comprises the following steps:
step 1: establishing a background system, a first IED device, a second IED device, a signal merging device and primary equipment in a transformer substation, wherein the first IED device and the second IED device are connected with the background system of the transformer substation, the first IED device and the second IED device are also connected with the signal merging device, and the signal merging device is connected with the primary equipment; the first IED device and the second IED device are connected;
the first IED device and the second IED device are used for acquiring running state signals of the primary equipment and uploading the signals to the background system, and meanwhile, the first IED device and the second IED device receive remote control commands issued by the background system and generate control output signals for remote control;
the signal merging device is used for merging control output signals sent by the first IED device and the second IED device into a final control signal through logical operation, and sending the final control signal to the primary equipment;
step 2: the signal merging device receives control output signals of the first IED device and the second IED device simultaneously, performs logic and processing on the control output signals to generate a final effective signal, and transmits the final effective signal to an execution mechanism of the primary equipment for execution;
the logic AND processing adopts an AND gate to process control signals of the first IED device and the second IED device;
and step 3: the method comprises the following steps that a state signal generated by primary equipment is transmitted to a signal multiplication device, the signal multiplication device copies the signal into two parts, the two parts are respectively transmitted to a first IED device and a second IED device, and the two parts are independently processed by the first IED device and the second IED device and then uploaded to a substation background system, and the method comprises the following steps:
step A: the signal combining device is provided with an analog signal multiplier;
and B: when the state signal generated by the primary equipment is a digital quantity signal, the signal merging device generates and outputs two same logic level signals according to the digital quantity signal; the signal merging device transmits two logic level signals to the first IED device and the second IED device respectively;
and C: when the state signal generated by the primary equipment is an analog quantity signal, the analog signal multiplier performs signal replication on the analog quantity signal to generate two paths of completely same analog signals; the signal merging device transmits the two paths of analog signals to the first IED device and the second IED device respectively; the two paths of analog signals are both analog signals of 4-20 mA or 0-5V;
and 4, step 4: the information exchange between the first IED device and the second IED device is carried out, the information of the first IED device and the information of the second IED device are ensured to be consistent, the information comprises equipment operation states, equipment control conditions and time, and the method comprises the following steps:
step D: the first IED device and the second IED device transmit the automatic control logic output signal state of the other IED device through the communication port, and the device which generates the effective logic output signal firstly is taken as a main synchronous state;
step E: after any one of the first IED device and the second IED device performs self-checking on the fault and outputs a fault state signal, the other IED device continues to execute the automatic control logic on the current automatic control logic output signal state;
and 5: upon failure of one of the first IED device and the second IED device, the failed IED device exits operation, comprising the steps of:
step F, after the signal merging device receives an IED device fault signal, marking the faulty IED device;
step G: the signal combination device treats the control signal of the failed IED device as an invalid signal.
The transformer substation background system comprises two servers which are a background system A and a background system B respectively, the first IED device is connected with the background system A and the background system B respectively, and the second IED device is connected with the background system A and the background system B respectively.
The redundancy design method of the intelligent primary equipment IED device solves the technical problem of redundancy control of a primary equipment body control cabinet, realizes redundancy configuration of two IED devices, and two sets of IED devices respectively operate independently; the signal merging device of the invention realizes complete hardware signal processing, avoids the possibility of software failure due to no software part, and ensures the reliability of system signal redundancy; the signal synchronization design between the two IED devices ensures the signal synchronization of the automatic control logic, thereby ensuring that under the condition of the fault of any device, the other normal device can continue to control the execution of the logic on the basis of the original control signal without generating any change disturbance of the control output signal; the invention can simultaneously solve the fault processing of internal and external faults of the IED device, and the reliability of the final control output of the control cubicle is not influenced; for internal faults, the device self-checking program can be used for realizing, and for external faults, effective control output can be realized through the AND logic of the signal combiner; the invention adopts the similar hardware and software technology of the substation control protection device, reduces the requirement on the reliability design of a single device, has lower redundancy configuration cost, meets the requirement on the system reliability, and is easy to install, configure and implement in the primary equipment control cubicle.
Drawings
FIG. 1 is a schematic diagram of a prior art configuration;
FIG. 2 is a schematic structural view of the present invention;
FIG. 3 is a signal combination logic diagram of the present invention;
fig. 4 is a flow chart of the present invention.
Detailed Description
The redundancy design method of the intelligent primary equipment IED device as shown in fig. 1-4 comprises the following steps:
step 1: establishing a background system, a first IED device, a second IED device, a signal merging device and primary equipment in a transformer substation, wherein the first IED device and the second IED device are connected with the background system of the transformer substation, the first IED device and the second IED device are also connected with the signal merging device, and the signal merging device is connected with the primary equipment; the first IED device and the second IED device are connected;
the first IED device and the second IED device are used for acquiring running state signals of the primary equipment and uploading the signals to the background system, and meanwhile, the first IED device and the second IED device receive remote control commands issued by the background system and generate control output signals for remote control;
the signal merging device is used for merging control output signals sent by the first IED device and the second IED device into a final control signal through logical operation, and sending the final control signal to the primary equipment;
step 2: the signal merging device receives control output signals of the first IED device and the second IED device simultaneously, performs logic and processing on the control output signals to generate a final effective signal, and transmits the final effective signal to an execution mechanism of the primary equipment for execution;
the logic AND processing adopts an AND gate to process control signals of the first IED device and the second IED device;
and step 3: the method comprises the following steps that a state signal generated by primary equipment is transmitted to a signal multiplication device, the signal multiplication device copies the signal into two parts, the two parts are respectively transmitted to a first IED device and a second IED device, and the two parts are independently processed by the first IED device and the second IED device and then uploaded to a substation background system, and the method comprises the following steps:
step A: the signal combining device is provided with an analog signal multiplier;
and B: when the state signal generated by the primary equipment is a digital quantity signal, the signal merging device generates and outputs two same logic level signals according to the digital quantity signal; the signal merging device transmits two logic level signals to the first IED device and the second IED device respectively;
and C: when the state signal generated by the primary equipment is an analog quantity signal, the analog signal multiplier performs signal replication on the analog quantity signal to generate two paths of completely same analog signals; the signal merging device transmits the two paths of analog signals to the first IED device and the second IED device respectively; the two paths of analog signals are both analog signals of 4-20 mA or 0-5V;
and 4, step 4: the information exchange between the first IED device and the second IED device is carried out, the information of the first IED device and the information of the second IED device are ensured to be consistent, the information comprises equipment operation states, equipment control conditions and time, and the method comprises the following steps:
step D: the first IED device and the second IED device transmit the automatic control logic output signal state of the other IED device through the communication port, and the device which generates the effective logic output signal firstly is taken as a main synchronous state;
step E: after any one of the first IED device and the second IED device performs self-checking on the fault and outputs a fault state signal, the other IED device continues to execute the automatic control logic on the current automatic control logic output signal state;
and 5: upon failure of one of the first IED device and the second IED device, the failed IED device exits operation, comprising the steps of:
step F, after the signal merging device receives an IED device fault signal, marking the faulty IED device;
step G: the signal combination device treats the control signal of the failed IED device as an invalid signal.
The transformer substation background system comprises two servers which are a background system A and a background system B respectively, the first IED device is connected with the background system A and the background system B respectively, and the second IED device is connected with the background system A and the background system B respectively.
The model of the analog signal multiplier is GSM-102 or GSM-106.
The first IED device, the second IED device and the signal merging device are all arranged in a primary equipment control cubicle.
The background system comprises an integrated online monitoring platform or a transformer substation integrated automation system.
The automatic control of the primary equipment state comprises temperature control, transformer gear control and GIS air supplement.
The invention can realize the dual redundant configuration of the IED device and keep the consistency of the dual configuration with a background monitoring system in order to improve the operation reliability of primary equipment and improve the effectiveness of monitoring the operation state of an equipment body by the IED device.
According to the invention, two independent IED devices are configured in the existing control cubicle, and a signal multiplication and signal combination device is added, so that the two sets of IED devices can be ensured to uniformly control the same equipment body execution mechanism (such as a transformer cooler, an on-load tap changer or a GIS switch air supplement device).
According to the control logic source differentiation, the control output of the IED device is divided into a superior command control and an automatic control program, in order to ensure that the control output is not disturbed when the first IED device and the second IED device operate simultaneously or when one IED device fails and exits the operation, the output can be normally controlled, and besides the signal multiplication and signal combination device, the IED device is required to add a control logic synchronization function, and the specific IED device control logic is described as follows:
step S1: the first IED device and the second IED device are both in a normal operating state: for the control command issued from the background system, the two IED devices respectively and independently process and output signals to the signal merging device, and the signal merging device performs AND logic processing according to the control output signals of the IED devices to generate final effective control signals to output and control the primary equipment body executing mechanism; for local automatic control logic inside the IED devices, the two IED devices respectively calculate, meanwhile, calculation results are interacted through communication, and the two IED devices finally output the device with the larger control output value of the calculation results as quasi-synchronous calculation data, so that the two IED devices are guaranteed to be consistent in control output result.
Step S2: one IED is in a fault operating state: for the fault found by the internal self-detection of the IED device, the device sends out a fault state signal, and the signal merging device carries out AND logic processing according to the fault state signal of the IED device and the control output signal to ensure that the output signal of the fault device is shielded; for faults occurring in external wiring of the IED devices, the signal merging device can compare control output signals of the two IED devices through an exclusive OR logic, and if the output signals of the two IED devices are large in deviation, a signal with inconsistent states is output to remind an operator to check the devices.
Step S3: both IEDs are in a fault operating state: for the fault found by the internal self-inspection of the IED device, if the two devices have fault state signals, the signal merging device enters a safe mode to operate, namely, the signal is controlled and output according to the maximum guarantee required by a user.
For faults occurring in external wiring of the IED devices, the signal merging device can compare control output signals of the two IED devices through an exclusive OR logic, and if the output signals of the two IED devices are large in deviation, a signal with inconsistent states is output to remind an operator to check the devices.
The redundancy design method of the intelligent primary equipment IED device solves the technical problem of redundancy control of a primary equipment body control cabinet, realizes redundancy configuration of two IED devices, and two sets of IED devices respectively operate independently; the signal merging device of the invention realizes complete hardware signal processing, avoids the possibility of software failure due to no software part, and ensures the reliability of system signal redundancy; the signal synchronization design between the two IED devices ensures the signal synchronization of the automatic control logic, thereby ensuring that under the condition of the fault of any device, the other normal device can continue to control the execution of the logic on the basis of the original control signal without generating any change disturbance of the control output signal; the invention can simultaneously solve the fault processing of internal and external faults of the IED device, and the reliability of the final control output of the control cubicle is not influenced; for internal faults, the device self-checking program can be used for realizing, and for external faults, effective control output can be realized through the AND logic of the signal combiner; the invention adopts the similar hardware and software technology of the substation control protection device, reduces the requirement on the reliability design of a single device, has lower redundancy configuration cost, meets the requirement on the system reliability, and is easy to install, configure and implement in the primary equipment control cubicle.
Claims (2)
1. The redundancy design method of the intelligent primary equipment IED device is characterized by comprising the following steps: the method comprises the following steps:
step 1: establishing a background system, a first IED device, a second IED device, a signal merging device and primary equipment in a transformer substation, wherein the first IED device and the second IED device are connected with the background system of the transformer substation, the first IED device and the second IED device are also connected with the signal merging device, and the signal merging device is connected with the primary equipment; the first IED device and the second IED device are connected;
the first IED device and the second IED device are used for acquiring running state signals of the primary equipment and uploading the signals to the background system, and meanwhile, the first IED device and the second IED device receive remote control commands issued by the background system and generate control output signals for remote control;
the signal merging device is used for merging control output signals sent by the first IED device and the second IED device into a final control signal through logical operation, and sending the final control signal to the primary equipment;
step 2: the signal merging device receives control output signals of the first IED device and the second IED device simultaneously, performs logic and processing on the control output signals to generate a final effective signal, and transmits the final effective signal to an execution mechanism of the primary equipment for execution;
the logic AND processing adopts an AND gate to process control signals of the first IED device and the second IED device;
and step 3: the method comprises the following steps that a state signal generated by primary equipment is transmitted to a signal multiplication device, the signal multiplication device copies the signal into two parts, the two parts are respectively transmitted to a first IED device and a second IED device, and the two parts are independently processed by the first IED device and the second IED device and then uploaded to a substation background system, and the method comprises the following steps:
step A: the signal combining device is provided with an analog signal multiplier;
and B: when the state signal generated by the primary equipment is a digital quantity signal, the signal merging device generates and outputs two same logic level signals according to the digital quantity signal; the signal merging device transmits two logic level signals to the first IED device and the second IED device respectively;
and C: when the state signal generated by the primary equipment is an analog quantity signal, the analog signal multiplier performs signal replication on the analog quantity signal to generate two paths of completely same analog signals; the signal merging device transmits the two paths of analog signals to the first IED device and the second IED device respectively; the two paths of analog signals are both analog signals of 4-20 mA or 0-5V;
and 4, step 4: the information exchange between the first IED device and the second IED device is carried out, the information of the first IED device and the information of the second IED device are ensured to be consistent, the information comprises equipment operation states, equipment control conditions and time, and the method comprises the following steps:
step D: the first IED device and the second IED device transmit the automatic control logic output signal state of the other IED device through the communication port, and the device which generates the effective logic output signal firstly is taken as a main synchronous state;
step E: after any one of the first IED device and the second IED device performs self-checking on the fault and outputs a fault state signal, the other IED device continues to execute the automatic control logic on the current automatic control logic output signal state;
and 5: upon failure of one of the first IED device and the second IED device, the failed IED device exits operation, comprising the steps of:
step F, after the signal merging device receives an IED device fault signal, marking the faulty IED device;
step G: the signal combination device treats the control signal of the failed IED device as an invalid signal.
2. The method of claim 1, wherein the substation background system comprises two servers, the two servers are a background system A and a background system B, the first IED device is connected with the background system A and the background system B, and the second IED device is connected with the background system A and the background system B.
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| CN108923530A (en) * | 2018-05-23 | 2018-11-30 | 国网上海市电力公司 | A kind of double set redundancy switching methods of transformer station measurement and control device |
| CN109765040A (en) * | 2019-01-03 | 2019-05-17 | 广州供电局有限公司 | The mechanical property on-line monitoring system of breaker |
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