CN112086867A - 500kV typical series circuit HGIS electrical interlocking control circuit - Google Patents
500kV typical series circuit HGIS electrical interlocking control circuit Download PDFInfo
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- CN112086867A CN112086867A CN201910760574.1A CN201910760574A CN112086867A CN 112086867 A CN112086867 A CN 112086867A CN 201910760574 A CN201910760574 A CN 201910760574A CN 112086867 A CN112086867 A CN 112086867A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/24—Circuit arrangements for boards or switchyards
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
Abstract
The invention belongs to the technical field of power line control, and particularly relates to a 500kV typical series loop HGIS electrical interlocking control loop. The electric interlocking control device is applied to HGIS (hybrid gas insulated switchgear) of a 500kV typical series circuit, wherein the typical series circuit comprises three intervals, a power plant outgoing line and a main transformer incoming line mechanism, the three intervals are 5051 intervals, 5052 intervals and 5053 intervals respectively, each interval comprises a circuit breaker, an isolation disconnecting link and a grounding disconnecting link, and the three circuit breakers at intervals are respectively as follows: an I-parent breaker (5053 CB), a medium breaker (5052CB), and a II-parent breaker (5051 CB). The invention carries out electrical interlocking on the spacing equipment, so that the high-voltage-grade equipment such as the circuit breaker, the disconnecting switch, the grounding switch and the like not only have good mechanical interlocking, but also have perfect electrical interlocking to ensure the normal and stable operation of the transformer substation.
Description
Technical Field
The invention belongs to the technical field of power line control, and particularly relates to a 500kV typical series loop HGIS electrical interlocking control loop.
Background
HGIS, fully known as Hybrid Gas Insulated Switchgear, is a Hybrid combined electrical apparatus. It combines the advantages of the totally-enclosed combined electrical apparatus technology and the simple characteristics of the open combined electrical apparatus. The HGIS is a complete high-voltage switch type combined electrical appliance interval, is a single-phase combined electrical appliance formed by combining a plurality of devices such as a circuit breaker, a disconnecting switch, a grounding switch and the like, does not have a bus, and is connected with an open type bus by a flexible conductor by utilizing an outgoing line sleeve. In a high voltage class substation such as a 500kV substation, the HGIS is generally applied on the 500kV high voltage class side, and adopts an 3/2 main wiring pattern.
All the devices such as circuit breakers, isolating switches and grounding switches in the HGIS have good mechanical interlocking, and electrical interlocking is also matched to ensure normal, safe and stable operation of the devices, and strict interlocking condition limits exist among all the functional units, namely the functional units are specified by the five-prevention requirement in the operation process of a transformer substation. The interlocking condition limitation between the isolation switch and the grounding switch of the common combined electrical appliance is realized by electrical interlocking. Because the electricity safety relates to the safety of a power grid and the life safety of people, one accident directly brings huge economic loss and social influence, and particularly has particularity on high-voltage power transmission and distribution, high-voltage substation equipment is expensive, complex to maintain and high in maintenance cost, and the composite combined equipment of the HGIS is sealed in a metal shell, so that certain difficulty is brought to maintenance. Along with the continuous promotion of power consumption, the power consumption contradiction is outstanding day by day, it is very important to guarantee that the power consumption safety involves the guarantee intact and reliability of equipment, consequently requires that the equipment function is perfect, and the electric interlocking is reliable, just can guarantee the personal safety of fortune dimension personnel in the operating equipment process, and at present, many electric interlocking are by PLC or singlechip program control, and the connecting wire is loaded down with trivial details and complicated, makes the reliability reduce and cost expense improve, or only installs mechanical interlock on the circuit breaker. In the existing electric control system, various electric interlocking devices have the defects of complex design, unreliable control and the like.
The patent document with publication number CN203134653U discloses a mechanical interlocking device for an open-type combined electrical apparatus isolating switch and a grounding switch, which comprises an interlocking rod, a guide sleeve, an interlocking shaft pin, a fan-shaped plate and an interlocking plate, wherein the interlocking rod is a vertically arranged rod body, the upper end of the interlocking rod is hinged with the outer end of a grounding transmission crank arm through a joint, the lower end of the interlocking rod is connected with the interlocking shaft pin through a joint, the interlocking shaft pin extends into the guide sleeve and is movably connected with the guide sleeve, and the guide sleeve is fixed on a bottom frame; the fan-shaped plate is arranged on the left side of the lower part of the guide sleeve on the underframe, the arc shape of the fan-shaped plate is upward, the lower end of the fan-shaped plate is hinged with the underframe, the side of the upper part of the fan-shaped plate, which is far away from the guide sleeve, is hinged with the interlocking plate, the interlocking plate is a strip-shaped plate, and the other side of the interlocking plate is hinged with the upper part of the right side of the isolation crank arm. The installation of this mechanical interlocking device receives the restriction in distance and position, and a series of problems such as the wearing and tearing that can have spare part unavoidably in the use and damage, the cooperation wearing and tearing of each part can influence chain effect even malfunctioning when above-mentioned problem appears, can not reach chain purpose, and its is with high costs, and the installation is inconvenient.
Patent document with publication number CN 204905103U discloses an on-off two-off electrical interlock, which comprises an electrical interlock composed of 3 circuit breakers, and a connection mode of an undervoltage release and a normally closed contact of an auxiliary contact of the circuit breaker; the circuit breaker comprises 3 circuit breakers, wherein the electrical linkage of the circuit breakers realizes normally closed and normally open, and an undervoltage release of any one circuit breaker and normally closed contacts of auxiliary contacts of the other two circuit breakers form a series circuit; when 3 breakers are in an opening state, the normally closed contacts are in a closing state, so that the under-voltage releases D1, D2 and D3 are electrified and attracted, and any breaker can be switched on; when 1 breaker of the 3 breakers is switched on, the under-voltage trippers of the 2 breakers in the switching-off state are released due to power failure, and the iron core ejector rods of the 2 breakers prop against the tripping half shaft of the breaker mechanism, so that the 2 breakers can not be switched on; when only 3 circuit breakers are in opening, the normally closed contacts of the auxiliary contacts are closed, and at the moment, the other 2 circuit breakers are opened
Any one breaker in the circuit breaker can carry out switching-on operation. The electrical interlocking utilizes the electrical interlocking of an under-voltage release and an auxiliary contact which are carried by a circuit breaker, and is realized mainly by the under-voltage release, and the under-voltage release has the defects of larger action value error, no adjustment, larger environmental influence and the like in the actual use process, so that the interlocking effect is influenced.
Disclosure of Invention
The invention aims to provide a 500kV series circuit HGIS electrical interlocking control circuit aiming at the problems in the prior art, and the electrical interlocking is carried out on interval equipment, so that not only is good mechanical interlocking realized among high-voltage-grade equipment such as a circuit breaker, a disconnecting switch, an earthing switch and the like, but also perfect electrical interlocking is realized to ensure the normal and stable operation of a transformer substation, and the personal safety of operation and maintenance personnel in the process of operating the equipment is ensured.
The technical scheme of the invention is as follows:
a500 kV typical series circuit HGIS electrical interlocking control circuit is applied to the electrical interlocking control of the HGIS of the 500kV typical series circuit, one typical series circuit comprises three intervals, a power plant outgoing line and a main transformer incoming line mechanism, the three intervals are 5051 intervals, 5052 intervals and 5053 intervals respectively, each interval comprises a circuit breaker, an isolation switch and a grounding switch, and the circuit breakers at the three intervals are respectively: an I-parent breaker (5053 CB), a medium breaker (5052CB), and a II-parent breaker (5051 CB).
Each interval respectively comprises: the isolation circuit breaker, the isolation disconnecting link at the side of the isolation close to the bus at the interval, the isolation disconnecting link at the side of the isolation close to the incoming line of the main transformer at the interval, the grounding disconnecting link at the side of the isolation close to the bus, the grounding disconnecting link at the side of the isolation close to the main transformer and the quick grounding disconnecting link; the HGIS electric interlocking control loop comprises the following steps: the isolation circuit breaker interlocking logic control circuit comprises an isolation circuit breaker interlocking logic control circuit, an isolation disconnecting link interlocking logic control circuit close to a bus side in an interval, an isolation disconnecting link interlocking logic control circuit close to a main transformer incoming line side in an interval, an isolation grounding switch interlocking logic control circuit close to a bus side in an interval, an isolation grounding switch interlocking logic control circuit close to a main transformer side in an interval and a quick grounding disconnecting link interlocking logic control circuit.
The HGIS electric interlocking control loop is connected in series in each electric control main loop to realize electric interlocking control.
Specifically, the mechanism of operation separating brake combined floodgate include that interval circuit breaker, interval lean on bus side isolation switch, interval lean on main transformer incoming line side isolation switch, interval lean on bus side ground connection switch, interval lean on main transformer side ground connection switch, quick ground connection switch, the secondary circuit of the mechanism of the operation separating brake combined floodgate that corresponds is: the isolation circuit breaker control circuit, the isolation disconnecting link control circuit on the bus side of the interval, the isolation disconnecting link control circuit on the main transformer incoming line side of the interval, the isolation disconnecting link control circuit on the bus side of the interval, the isolation disconnecting link control circuit on the main transformer side of the interval, and the quick grounding disconnecting link control circuit.
Specifically, the interlocking logic control loop of the bay circuit breaker comprises a series loop formed by connecting absolute positions of A, B, C three phases of the isolation disconnecting link at the spacing side close to the main transformer incoming line side and absolute positions of A, B, C three phases of the isolation disconnecting link at the spacing side close to the bus side in series, and the interlocking logic control loop is connected into the absolute positions of the isolation disconnecting links at two sides in the electrical control main loop of the bay circuit breaker in series to realize electrical interlocking control.
Specifically, the isolated knife switch interlocking logic control circuit on the isolated bus side comprises a circuit formed by serially connecting normally closed contacts of an isolated bus-side grounding knife switch A phase, a normally closed contact of a isolated bus-side grounding knife switch B phase and a normally closed contact of an isolated main transformer-side grounding knife switch A phase, a normally closed contact of an isolated bus-side grounding knife switch B phase and a normally closed contact of an isolated circuit breaker C phase in series, and the isolated bus-side isolated knife switch can be operated to be opened or closed when the two side grounding knife switches.
Specifically, the interval is close to the linkage logic control circuit of main transformer side isolation switch and is including establishing ties: the interval is connected in series by the normally closed contacts of the bus side grounding disconnecting link A phase, the B phase and the C phase, the interval is connected in series by the normally closed contacts of the main transformer side grounding disconnecting link A phase, the B phase and the C phase, the interval circuit breaker A phase, the B phase and the C phase, the quick grounding switch A phase, the B phase and the C phase, the main transformer medium voltage side quick grounding switch three-phase normally closed contacts, the main transformer low voltage side grounding switch three-phase normally closed contacts and the interval circuit breaker measurement and control device locking contacts.
Specifically, the interval leans on busbar side earthing switch interlocking logic control circuit to include: normally closed contacts of A phase, B phase and C phase of the isolation disconnecting link at the interval side close to the bus are connected in series, and the isolation disconnecting links at the two sides can only operate the isolation disconnecting link at the interval side close to the grounding switch at the disconnecting position to switch on or switch off.
Specifically, the interval leans on main transformer side earthing switch interlocking logic control circuit to include: normally closed contacts of A phase, B phase and C phase of the isolation disconnecting link at the interval side close to the main line side are connected in series, and the isolation disconnecting links at the two sides can only operate the interval to be switched on or switched off by a grounding switch at the main transformer side in the state of a switching-off position.
Specifically, the quick grounding switch interlocking logic control loop comprises the following components in series: normally closed contacts of the disconnecting link A phase, the disconnecting link B phase and the disconnecting link C phase are isolated at the side close to the bus at intervals and are connected in series; normally closed contacts of the disconnecting link A phase, the disconnecting link B phase and the disconnecting link C phase are isolated and connected in series at intervals by the incoming line side of the main transformer; the auxiliary contacts of the A phase, the B phase and the C phase of the high-voltage live display simultaneously meet the condition that the isolation disconnecting switches on two sides are in a disconnecting position and the quick grounding disconnecting switch can be operated only when the live detection monitoring voltage on the high-voltage side of the main transformer is not applied.
Specifically, the 5051 interval includes: 5051 interval circuit breaker (5051CB), 5051 interval bus-side isolation disconnecting link (50511G), 5051 interval main-line-side isolation disconnecting link (50512G), 5051 interval bus-side grounding disconnecting link (505117D), 5051 interval main-side grounding disconnecting link (505127D) and 5051 quick grounding disconnecting link (505167D).
Specifically, the 5052 interval includes: 5052 spacing circuit breaker (5052CB), 5052 spacing bus-side isolation disconnecting link (50521G), 5052 spacing main-line-side isolation disconnecting link (50522G), 5052 spacing bus-side grounding disconnecting link (505217D), 5051 spacing main-side grounding disconnecting link (505227D) and 5052 quick grounding disconnecting link (505267D).
Specifically, the 5053 interval includes: 5053 spacing circuit breaker (5053 CB), 5053 spacing bus-side isolation disconnecting link (50531G), 5053 spacing main-line-side isolation disconnecting link (50532G), 5053 spacing bus-side grounding disconnecting link (505317D), 5053 spacing main-side grounding disconnecting link (505327D) and 5053 quick grounding disconnecting link (505367D).
In the application of the power system, the power supply system generally comprises a plurality of transformers and buses, and also comprises incoming lines and bus breakers. The allowed closing condition of each breaker (switch) is restricted by the remaining breakers. Therefore, the problem of electrical interlocking in the multi-power multi-bus switching process is often encountered, namely, necessary electrical interlocking must be arranged between the power incoming line circuit breaker and the bus circuit breaker to prevent misoperation, so that equipment damage and personal casualty accidents are avoided.
Interlocking of two incoming lines and a bus breaker in an electric power system is designed with many classical options, but when the number of breakers is large, the interlocking between them is complicated. For example, for a power line with 4 incoming lines and 4 sections of buses, communication is arranged among the buses, 7 breakers are required to be arranged, because whether each breaker (switch) is allowed to be closed is limited by other 6 breakers, if a truth table method is directly used for obtaining a logic expression, because a truth table is too large due to a large number of variables, and after the expression is written by using the truth table, the simplification by using a formula method or a Carnot method is very difficult, the obtaining of the simplest expression is also very difficult, and an interlocking circuit of the interlocking circuit is also unavailable.
In the existing electrical control system, the electrical interlocking design is usually to single components and parts to carry out interlocking control, many electrical interlocks are controlled by a PLC or a single chip microcomputer program, the connecting wire is complicated and complex, the reliability is reduced, the cost is increased, or only a mechanical interlocking device is arranged on the circuit breaker. Various electric interlocking devices have the defects of complicated design, unreliable control and the like,
the invention has the beneficial effects that: a500 kV series circuit HGIS electrical interlocking control circuit is applied to the electrical interlocking control of the HGIS of a 500kV typical series circuit, the typical series circuit comprises three intervals, a power plant outgoing line and a main transformer incoming line mechanism, the three intervals are 5051 intervals, 5052 intervals and 5053 intervals respectively, the electrical interlocking is carried out on the interval equipment, and each interval comprises: the isolation circuit breaker, the isolation disconnecting link at the side of the isolation close to the bus at the interval, the isolation disconnecting link at the side of the isolation close to the incoming line of the main transformer at the interval, the grounding disconnecting link at the side of the isolation close to the bus, the grounding disconnecting link at the side of the isolation close to the main transformer and the quick grounding disconnecting link; the HGIS electric interlocking control loop comprises the following steps: a spacing circuit breaker interlocking logic control loop, a spacing bus-side isolation disconnecting link interlocking logic control loop, a spacing main transformer incoming line-side isolation disconnecting link interlocking logic control loop, a spacing bus-side grounding switch interlocking logic control loop, a spacing main transformer-side grounding switch interlocking logic control loop and a quick grounding disconnecting link interlocking logic control loop, the electric interlocking is carried out on the interval equipment, the electric control main loop comprises a positive power supply, a secondary loop controlled by a mechanism for operating the opening and closing of the switch and a negative power supply, the HGIS electric interlocking control loop is connected in series in each electric control main loop to realize electric interlocking control, by the device with high voltage level, such as the breaker, the isolating switch, the grounding switch and the like, not only is good mechanical interlocking realized, and perfect electric interlocking is provided to ensure the normal and stable operation of the transformer substation, and the personal safety of operation and maintenance personnel in the process of operating the equipment is ensured. The high-voltage-level transformer substation equipment is expensive, complex in maintenance and high in maintenance cost, and the HGIS composite combined equipment is sealed in the metal shell, and can be protected and operated doubly by electric interlocking, so that personal and equipment damages caused by operation errors of operation and maintenance personnel are reduced.
The electric interlocking control circuit of this patent is simple and clear, and concatenates between main control circuit positive and negative power, need not be aided with other operations in the operation, and the shutting is reliable. Moreover, the electrical interlocking control circuit provided by the invention aims at an electrical main wiring type of an important series circuit, namely 'power plant-main transformer', the interlocking logic in the complex wiring is shown by a popular and easily-understood interlocking logic schematic diagram, the wiring is simple, no secondary circuit exists, and the electrical interlocking control circuit can be better used as a typical circuit of electrical interlocking.
Drawings
Fig. 1 is a schematic diagram of a 5051 interval circuit breaker control main circuit provided in embodiment 1;
FIG. 2 is a schematic view of the upper left portion of FIG. 1;
FIG. 3 is a schematic view of the upper right portion of FIG. 1;
FIG. 4 is a schematic view of the lower left portion of FIG. 1;
FIG. 5 is a schematic view of the lower right portion of FIG. 1;
fig. 6 is a schematic diagram of an electrical interlock control loop of the 5051 interval circuit breaker provided in embodiment 1;
FIG. 7 is a schematic diagram of the interval electrical interlocking logic of the 5051 interval circuit breaker provided in embodiment 1;
fig. 8 is a wiring schematic of the bay circuit breaker 5051;
FIG. 9 is a schematic diagram of a main series circuit connection of the power plant main transformer;
FIG. 10 is a schematic diagram of the main transformer wiring in a main series circuit of the power plant main transformer;
FIG. 11 is a schematic of the upper left portion of the control main loop of 50511G;
FIG. 12 is a schematic top right portion of the control main loop of 50511G;
FIG. 13 is a schematic of the lower left portion of the control main loop of 50511G;
FIG. 14 is a lower right schematic view of the control main loop of 50511G;
FIG. 15 is a schematic of the upper left portion of the control main loop of 50512G;
FIG. 16 is a schematic top right portion of the control main loop of 50512G;
FIG. 17 is a schematic of the lower left portion of the control main loop of 50512G;
FIG. 18 is a lower right schematic view of the control main loop of 50512G;
FIG. 19 is a schematic diagram of the upper left portion of the control main loop of 505117D;
FIG. 20 is a schematic top right portion of the control primary loop of 505117D;
FIG. 21 is a schematic view of the lower left portion of the control main loop of 505117D;
FIG. 22 is a schematic view of the lower right portion of the control main loop of 505117D;
FIG. 23 is a schematic diagram of the upper left portion of the control main loop of 505127D;
FIG. 24 is a schematic top right portion of the control primary loop of 505127D;
FIG. 25 is a schematic view of the lower left portion of the control main loop of 505127D;
FIG. 26 is a schematic view of the lower right portion of the control main loop of 505127D;
FIG. 27 is a schematic of the upper left portion of the control main loop of 505167D;
FIG. 28 is a schematic top right portion of the control primary loop of 505167D;
FIG. 29 is a schematic view of the lower left portion of the control main loop of 505167D;
FIG. 30 is a schematic diagram of the lower right portion of the control loop of 505167D
Wherein in FIG. 7
The normally open auxiliary contacts of the A phase, the B phase and the C phase are connected in series, and the switch is in a closed position;
the normally closed auxiliary contacts of the A phase, the B phase and the C phase are connected in series, and the switch is in a separated position.
Detailed Description
The technical scheme provided by the invention is explained in detail by combining specific embodiments.
A500 kV typical series circuit HGIS electrical interlocking control circuit is applied to electrical interlocking control of an HGIS of a 500kV typical series circuit, a typical series circuit comprises three intervals, a power plant outgoing line mechanism and a main transformer incoming line mechanism, as shown in figures 9 and 10, the three intervals are 5051 intervals, 5052 intervals and 5053 intervals respectively, a wiring schematic diagram of the 5051 intervals is shown in figure 8, each interval comprises a circuit breaker, an isolation switch and a grounding switch, and the three intervals of the circuit breakers are respectively: an I-parent breaker (5053 CB), a medium breaker (5052CB), and a II-parent breaker (5051 CB).
Each interval respectively comprises: the isolation circuit breaker, the isolation disconnecting link at the side of the isolation close to the bus at the interval, the isolation disconnecting link at the side of the isolation close to the incoming line of the main transformer at the interval, the grounding disconnecting link at the side of the isolation close to the bus, the grounding disconnecting link at the side of the isolation close to the main transformer and the quick grounding disconnecting link; the HGIS electric interlocking control loop comprises the following steps: the isolation circuit breaker interlocking logic control circuit comprises an isolation circuit breaker interlocking logic control circuit, an isolation disconnecting link interlocking logic control circuit close to a bus side in an interval, an isolation disconnecting link interlocking logic control circuit close to a main transformer incoming line side in an interval, an isolation grounding switch interlocking logic control circuit close to a bus side in an interval, an isolation grounding switch interlocking logic control circuit close to a main transformer side in an interval and a quick grounding disconnecting link interlocking logic control circuit.
The HGIS electric interlocking control loop is connected in series in each electric control main loop to realize electric interlocking control.
The series loop is formed by 5051, 5052 and 5053 (naming rule: three interval names of a 5 th series, 5051 interval, 5052 interval and 5053 interval, each interval comprises a circuit breaker, an isolation switch and a grounding switch), three interval devices, a power plant outgoing line and a main transformer incoming line. The electrical equipment of the series loop adopts HGIS type equipment, a current transformer, an isolation disconnecting link and a grounding disconnecting link are arranged on two sides of a circuit breaker, 5051 is connected to a 500kV1 bus at intervals, 5053 is connected to a 500kV2 bus at intervals, and all the devices form a series loop.
Example 1
Taking 5051 interval as an example, the 5051 interval contains the following equipment conditions: 5051 (CB) shows a 5051 interval circuit breaker, a control main circuit schematic diagram of which is shown in FIG. 1, wherein FIG. 2, FIG. 3, FIG. 4 and FIG. 5 are partial schematic diagrams of FIG. 1 respectively; 50511G shows a 5051 isolated busbar-side isolation switch which controls portions of the main circuit schematic as shown in fig. 11, 12, 13 and 14 respectively; 50512G shows 5051 spacing main transformer incoming line side isolation switch, which controls each part of the main circuit schematic diagram as shown in fig. 15, fig. 16, fig. 17 and fig. 18; 505117D shows 5051 a spaced bus-side grounding switch, which controls various parts of the main circuit schematic as shown in FIGS. 19, 20, 21 and 22, respectively; 505127D shows 5051 a space closer to the main transformer side earthing switch, which controls each part of the main circuit as shown in FIGS. 23, 24, 25 and 26 respectively; 505167D shows 5051 interval with main-transformer-side grounding knife (also called quick grounding knife switch) and each part of the main control loop is shown in FIG. 27, FIG. 28, FIG. 29 and FIG. 30; 5052 spacing and 5053 spacing are similar to 5051.
Wherein the edge breaker (5051CB) interlocking logic control loop: the edge breaker (5051CB) is interlocked to the absolute position of the isolation disconnecting link at two sides of the access breaker. The circuit comprises a series circuit formed by absolute position series of A, B, C three phases of an isolation switch (50512G) and absolute position series of A, B, C three phases of an isolation switch (50511G).
An isolation switch (50511G) interlocking logic control loop: the isolation disconnecting link (50511G) is interlocked in a way that the isolation disconnecting link can be operated to be opened or closed in a state that the grounding switches on the two sides of the isolation disconnecting link are disconnected and the circuit breaker is disconnected. The circuit is formed by connecting the normally closed contacts of the A phase, the B phase and the C phase of the grounding disconnecting link (505117D) in series with the normally closed contacts of the A phase, the B phase and the C phase of the grounding disconnecting link (505127D) in series and connecting the normally closed contacts of the A phase, the B phase and the C phase of the side circuit breaker (5051CB) in series with the three normally closed contacts of the A phase, the B phase and the C phase in series.
An isolation switch (50512G) interlocking logic control loop: the isolation disconnecting link (50512G) is an isolation disconnecting link close to the main transformer side, and the interlocking logic of the isolation disconnecting link needs to consider the locking of the grounding switch on the medium-low voltage side of the main transformer and the locking of the interval grounding switch and the circuit breaker. The specific interlocking loop comprises: the normally closed contacts of the A phase, the B phase and the C phase of the grounding disconnecting link (505117D) are connected in series; the normally closed contacts of the A phase, the B phase and the C phase of the grounding disconnecting link (505127D) are connected in series; normally closed contacts of A phase, B phase and C phase of the side circuit breaker (5051CB) are connected in series; the normally closed contacts of A phase, B phase and C phase of a grounding knife switch (505167D) (also called a quick grounding knife) are connected in series; a main transformer medium-voltage side quick grounding knife (ES 193) three-phase normally closed contact; a main transformer low-voltage side main transformer side grounding knife (6 GD2) three-phase normally closed contact; the side breaker (5051) measures and controls the device to close the contact;
the logic control loop interlocked with the grounding knife switch (505127D) is linked by the grounding knife switch (505117D): the interlocking logic of the two grounding knives is the same, and the two side isolation knives can only operate the grounding knives to switch on or switch off in the state of the switch-off position. The specific interlocking loop comprises: normally closed contacts of A phase, B phase and C phase of the isolation disconnecting link (50511G) are connected in series; normally closed contacts of A phase, B phase and C phase of the isolation switch (50512G) are connected in series.
The grounding knife switch (505167D) interlocks the logic control loop: 505167D earthing knife switch is an earthing knife near the main transformer incoming line loop side, also called as a quick earthing knife, the interlocking logic of the earthing knife switch can operate the earthing knife except the state of the isolation knife switches at the switch-off position at the two sides, and the earthing knife can be operated only when the main transformer high voltage side live detection monitoring is not pressure. The specific interlocking loop comprises: normally closed contacts of A phase, B phase and C phase of the isolation disconnecting link (50511G) are connected in series; normally closed contacts of A phase, B phase and C phase of the isolation switch (50512G) are connected in series; auxiliary contacts of A phase, B phase and C phase of the high-voltage charged display.
The electric interlocking control loops are connected in series in the operation main loops of the mechanisms by the access points, if the electric interlocking loops are not connected, the operation main loops of the mechanisms are not connected. Moreover, the electrical interlocking control circuit provided by the invention aims at an electrical main wiring type of an important series circuit, namely 'power plant-main transformer', the interlocking logic in the complex wiring is shown by a popular and easily-understood interlocking logic schematic diagram, the wiring is simple, no secondary circuit exists, and the electrical interlocking control circuit can be better used as a typical circuit of electrical interlocking.
Example 2
The difference between this embodiment and embodiment 1 is that the 5052 interval is taken as an example, and the 5052 interval includes: 5052 spacing circuit breaker (5052CB), 5052 spacing bus-side isolation disconnecting link (50521G), 5052 spacing main-line-side isolation disconnecting link (50522G), 5052 spacing bus-side grounding disconnecting link (505217D), 5051 spacing main-side grounding disconnecting link (505227D) and 5052 quick grounding disconnecting link (505267D). The main control circuit and the interlock control loop are the same as those of the 5051 interval described in the embodiment.
Example 3
The difference between this embodiment and embodiment 1 is that the 5053 interval is taken as an example, and the 5053 interval includes: the main control circuit and the interlocking control circuit of the 5053 spacing circuit breaker (5053 CB), the 5053 spacing bus-side isolation disconnecting link (50531G), the 5053 spacing main-line-side isolation disconnecting link (50532G), the 5053 spacing bus-side grounding disconnecting link (505317D), the 5053 spacing main-side grounding disconnecting link (505327D) and the 5053 quick grounding disconnecting link (505367D) are the same as those of the 5051 spacing circuit in the embodiment.
Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present invention and not to limit the same; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will understand that: modifications to the specific embodiments of the invention or equivalent substitutions for parts of the technical features may be made; without departing from the spirit of the present invention, it is intended to cover all aspects of the invention as defined by the appended claims.
Claims (6)
1. A500 kV typical series circuit HGIS electrical interlocking control circuit is applied to the electrical interlocking control of the HGIS of the 500kV typical series circuit, one typical series circuit comprises three intervals, a power plant outgoing line and a main transformer incoming line mechanism, the three intervals are 5051 intervals, 5052 intervals and 5053 intervals respectively, each interval comprises a circuit breaker, an isolation switch and a grounding switch, and the circuit breakers at the three intervals are respectively: an I female side circuit breaker (5053 CB), a middle circuit breaker (5052CB), and a II female side circuit breaker (5051CB),
each interval respectively comprises: the isolation circuit breaker, the isolation disconnecting link at the side of the isolation close to the bus at the interval, the isolation disconnecting link at the side of the isolation close to the incoming line of the main transformer at the interval, the grounding disconnecting link at the side of the isolation close to the bus, the grounding disconnecting link at the side of the isolation close to the main transformer and the quick grounding disconnecting link;
the HGIS electric interlocking control loop comprises the following steps: the isolation circuit breaker interlocking logic control circuit comprises an isolation circuit breaker interlocking logic control circuit, an isolation disconnecting link interlocking logic control circuit close to a bus side in an interval, an isolation disconnecting link interlocking logic control circuit close to a main transformer incoming line side in an interval, an isolation grounding switch interlocking logic control circuit close to a bus side in an interval, an isolation grounding switch interlocking logic control circuit close to a main transformer side in an interval and a quick grounding disconnecting link interlocking logic control circuit;
the HGIS electric interlocking control loop is connected in series in each electric control main loop to realize electric interlocking control.
2. The 500kV typical series circuit HGIS electrical interlocking control circuit according to claim 1, wherein the mechanism for operating the opening and closing comprises a disconnecting switch, an isolation switch on the bus side at an interval, an isolation switch on the incoming line side at an interval, a grounding switch on the bus side at an interval, a grounding switch on the main side at an interval, and a quick grounding switch, and the secondary circuit of the corresponding mechanism for operating the opening and closing is: the isolation circuit breaker control circuit, the isolation disconnecting link control circuit on the bus side of the interval, the isolation disconnecting link control circuit on the main transformer incoming line side of the interval, the isolation disconnecting link control circuit on the bus side of the interval, the isolation disconnecting link control circuit on the main transformer side of the interval, and the quick grounding disconnecting link control circuit.
3. The 500kV typical series circuit HGIS electrical interlocking control circuit as claimed in claim 2, wherein the isolating circuit breaker interlocking logic control circuit comprises a series circuit formed by connecting the absolute positions of A, B, C three phases of the isolating disconnecting switch at the isolating switch side close to the main transformer and the absolute positions of A, B, C three phases of the isolating switch at the bus side in series, and the series circuit is connected into the isolating circuit breaker electrical control main circuit to realize the electrical interlocking control;
the isolated disconnecting link interlocking logic control circuit on the isolated side close to the bus comprises a circuit formed by connecting normally closed contacts of an isolated grounding disconnecting link on the isolated side close to the bus in series, normally closed contacts of an isolated grounding disconnecting link on the main transformer side in series, normally closed contacts of an isolated grounding disconnecting link on the isolated side close to the bus in series, normally closed contacts of a phase A, a phase B and a phase C in series and normally closed contacts of an isolated circuit breaker on the isolated side close to the bus in series, wherein the isolated disconnecting links on the two sides are disconnected, and the isolated disconnecting link on the isolated side close to the bus can be operated to be switched off or;
the interval is close to the linkage logic control circuit of main transformer side isolation switch and is including establishing ties: the interval is connected in series by the normally closed contacts of the A phase, the B phase and the C phase of the bus side grounding disconnecting link, the interval is connected in series by the normally closed contacts of the A phase, the B phase and the C phase of the main transformer side grounding disconnecting link, the normally closed contacts of the A phase, the B phase and the C phase of the interval circuit breaker, the normally closed contacts of the A phase, the B phase and the C phase of the quick grounding switch, the three-phase normally closed contact of the main transformer medium-voltage side quick grounding switch, the three-phase normally closed contact of the main transformer low-voltage side grounding switch and the blocking contact of the interval circuit breaker measuring;
the interval leans on busbar side earthing switch interlocking logic control circuit to include: normally closed contacts of A phase, B phase and C phase of the isolation disconnecting link at the interval side close to the bus are connected in series, and the isolation disconnecting links at the two sides can only operate the isolation disconnecting link at the interval side close to the grounding switch at the disconnecting position to switch on or switch off;
the interval leans on the linkage logic control circuit of main transformer side earthing switch to include: normally closed contacts of A phase, B phase and C phase of the isolation disconnecting link at the interval side close to the main line side are connected in series, and the isolation disconnecting links at the two sides can only operate the interval to be switched on or switched off by a grounding switch at the main transformer side in the state of a switching-off position;
the quick grounding knife switch interlocking logic control loop comprises the following components in series connection: normally closed contacts of the disconnecting link A phase, the disconnecting link B phase and the disconnecting link C phase are isolated at the side close to the bus at intervals and are connected in series; normally closed contacts of the disconnecting link A phase, the disconnecting link B phase and the disconnecting link C phase are isolated and connected in series at intervals by the incoming line side of the main transformer; the auxiliary contacts of the A phase, the B phase and the C phase of the high-voltage live display simultaneously meet the condition that the isolation disconnecting switches on two sides are in a disconnecting position and the quick grounding disconnecting switch can be operated only when the live detection monitoring voltage on the high-voltage side of the main transformer is not applied.
4. A 500kV typical string circuit HGIS electrical interlock control loop as claimed in claim 3, wherein said 5051 interval comprises: 5051 interval circuit breaker (5051CB), 5051 interval bus-side isolation disconnecting link (50511G), 5051 interval main-line-side isolation disconnecting link (50512G), 5051 interval bus-side grounding disconnecting link (505117D), 5051 interval main-side grounding disconnecting link (505127D) and 5051 quick grounding disconnecting link (505167D).
5. A 500kV typical string circuit HGIS electrical interlock control loop as claimed in claim 3, wherein said 5052 interval comprises: 5052 spacing circuit breaker (5052CB), 5052 spacing bus-side isolation disconnecting link (50521G), 5052 spacing main-line-side isolation disconnecting link (50522G), 5052 spacing bus-side grounding disconnecting link (505217D), 5051 spacing main-side grounding disconnecting link (505227D) and 5052 quick grounding disconnecting link (505267D).
6. A 500kV typical string circuit HGIS electrical interlock control loop as claimed in claim 3, wherein said 5053 interval comprises: 5053 spacing circuit breaker (5053 CB), 5053 spacing bus-side isolation disconnecting link (50531G), 5053 spacing main-line-side isolation disconnecting link (50532G), 5053 spacing bus-side grounding disconnecting link (505317D), 5053 spacing main-side grounding disconnecting link (505327D) and 5053 quick grounding disconnecting link (505367D).
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