CN105024347A - Blocking filter protection equipment - Google Patents
Blocking filter protection equipment Download PDFInfo
- Publication number
- CN105024347A CN105024347A CN201510391375.XA CN201510391375A CN105024347A CN 105024347 A CN105024347 A CN 105024347A CN 201510391375 A CN201510391375 A CN 201510391375A CN 105024347 A CN105024347 A CN 105024347A
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- CN
- China
- Prior art keywords
- block filter
- phase
- phase block
- protective relaying
- relaying device
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Abstract
The invention proposes blocking filter protection equipment, and belongs to the technical field of power system relay protection. The equipment comprises a multi-phase blocking filter, a plurality of bypass switches, a plurality of relay protection devices, and a protection screen cabinet, wherein the protection screen cabinet enables the plurality of relay protection devices to be stored together. The multi-phase blocking filter, the plurality of bypass switches and the plurality of relay protection devices are corresponding in a one-one manner. The equipment solves a problem of synchronization loss and shutdown caused by the abnormality of the protection devices, and is safe and reliable.
Description
Technical field
The invention belongs to Relay Protection Technology in Power System field, particularly relate to a kind of block filter proterctive equipment.
Background technology
The Transmission Mode of the equipment such as series capacitor compensation configures in transmission line for long distance powedr transmission, when parameter not at that time, the sub-synchronous oscillation phenomenon of generating set 1 (Fig. 1) may be there is, time serious, generating set macro-axis may be damaged, cause macro-axis to sprain.For suppressing sub-synchronous oscillation, as shown in Figure 1, heterogeneous block filter 3 (there is shown A, B, C three-phase block filter) can be installed in main transformer 2 high-pressure side, increase the subsynchronous damping of electric power transmission network, prevent and suppress the generation of sub-synchronous oscillation.Such as, China's Inner Mongol Datang Tuoketuo Power Plant, installed capacity is 8 × 600MW, and through holder source four, loop line is delivered to Huiyuan transformer station, then through source peace double loop, source despot's double loop to Beijing-Tianjin-Tangshan Grid power transmission.The circuit of Huiyuan transformer station is installed 8 cover fixed capacity strings mend, installed static block filter in the high-pressure side of generator main transformer.
Block filter can be arranged on main transformer neutral point side, can be set to heterogeneous, and every phase block filter has a by-pass switch.When normally running, by-pass switch disconnects, and block filter puts into operation; When certain phase block filter breaks down, protective device action exports, and closes bypass switch, makes this phase block filter out of order out of service.According to operating standard, for preventing sub-synchronous oscillation from damaging generating set, require when there is two-phase or multiphase block filter situation out of service (when the by-pass switch of correspondence closes), the necessary off-the-line of generating set.
In the prior art, as shown in Figure 2, protective device is protected by rank block filter, and namely heterogeneous block filter firstorder circuit is protected by same protective device.There is risk in this protection group screen; such as once there is such situation in the on-the-spot protective device run: protective device itself occurs abnormal; protection misoperation; the by-pass switch of heterogeneous block filter is all closed; namely heterogeneous block filter is simultaneously out of service; finally cause generating set off-the-line to be shut down, cause unnecessary power generation loss.For a 600MW fired power generating unit, restart after shutdown, because a process of stove radiator is longer, direct cost may up to 1,000,000 yuan.
Summary of the invention
The object of the present invention is to provide a kind of novel block filter proterctive equipment, overcome the upper the problems referred to above existed in prior art, realize heterogeneous block filter and protect decoupling zero each other, reduce the risk that generating set runs.
For realizing above object, the present invention proposes a kind of block filter proterctive equipment, this equipment comprises: heterogeneous block filter, multiple by-pass switch, multiple protective relaying device and protection screen cabinet, wherein: the quantity of described heterogeneous block filter, described multiple by-pass switch and described multiple protective relaying device is identical; Each phase block filter in described heterogeneous block filter is all connected in parallel to a different by-pass switch using the by-pass switch as this phase block filter; Each phase block filter is all coupled to a different protective relaying device using the protective relaying device as this phase block filter; The by-pass switch of each phase block filter is coupled to the protective relaying device of this phase block filter; And each phase block filter described all comprises the current transformer of the protective relaying device being coupled to this phase block filter; And described multiple protective relaying device is arranged in described protection screen cabinet.
According to an aspect of the present invention, each phase block filter described comprises: the 0 rank circuit be cascaded, 1 rank circuit, 2 rank circuit and 3 rank circuit, and wherein 0 rank circuit is 0 rank reactor L0; The Current Transmit that 1 rank circuit comprises the capacitor C1 of the 1st group of parallel connection and reactor L1 and connects with capacitor C1, reactor L1 respectively
c1, CT
l1; The Current Transmit that 2 rank circuit comprise the capacitor C2 of the 2nd group of parallel connection and reactor L2 and connect with capacitor C2, reactor L2 respectively
c2, CT
l2; The Current Transmit that 3 rank circuit comprise the capacitor C3 of the 3rd group of parallel connection and reactor L3 and connect with capacitor C3, reactor L3 respectively
c3, CT
l3, wherein, CT
c1, CT
c2, CT
c3the current transformer of C1, C2, C3 respectively, CT
l1, CT
l2, CT
l3the current transformer of L1, L2, L3 respectively; In addition, each phase block filter also comprises the Current Transmit with 0 rank circuit, 1 rank circuit, 2 rank circuit and 3 rank circuit connected in series
sBF, this Current Transmit
sBFit is the current transformer of whole block filter; Each current transformer of each phase block filter is all coupled to the protective relaying device of this phase block filter.
According to an aspect of the present invention, described heterogeneous block filter is heterogeneous static block filter, and this heterogeneous static block filter is connected between the main transformer high-pressure side of transmission line and ground.
According to an aspect of the present invention, described heterogeneous block filter is three-phase block filter, is respectively A phase block filter, B phase block filter and C phase block filter; Described multiple protective relaying device is respectively the first protective relaying device being coupled to A phase block filter, the second protective relaying device being coupled to B phase block filter and is coupled to the 3rd protective relaying device of C phase block filter.
In the technical scheme that the present invention proposes; three-phase or heterogeneous block filter adopt different protective devices to protect; unconnected each other, this protection group screen scheme solves the shortcoming of original protection group screen scheme---have that protective device is abnormal causes three-phase the block filter out of service and then problem that causes unit trip to be shut down simultaneously.According to the solution of the present invention, even if there have protective device to occur to be abnormal, at most also just cause a phase block filter out of service, generating set can continue to run, and shuts down without the need to off-the-line.
Accompanying drawing explanation
Fig. 1 is block filter installation site schematic diagram;
Fig. 2 is the schematic diagram of existing protection group screen mode;
Fig. 3 is blocking filter circuit structural representation according to an embodiment of the invention;
Fig. 4 is the schematic diagram of block filter protective device circuit structure according to an embodiment of the invention;
Fig. 5 is the structure chart of the protection screen cabinet of block filter proterctive equipment according to an embodiment of the invention.
Embodiment
The following stated is better embodiment of the present invention, does not therefore limit protection scope of the present invention.
The present invention relates to an actual generating set 1, generator rating power is 600MW, rated voltage 22kV, rated power factor 0.9; Main transformer rated capacity 750MVA, rated voltage no-load voltage ratio 500kV/22kV, adopt the Yd-11 mode of connection, short-circuit impedance 13.5%; As shown in Figure 1, main transformer 2 high-pressure side neutral point is opened, ground connection after serial connection three-phase (or heterogeneous) static block filter 3.
The circuit structure of block filter is according to an embodiment of the invention described referring to Fig. 3.Fig. 3 shows the circuit structure of a phase block filter, and the block filter of other phases is identical with the circuit structure shown in Fig. 3.Wherein, block filter comprises the 0 rank circuit, 1 rank circuit, 2 rank circuit and the 3 rank circuit that are cascaded, and PSW1 is by-pass switch, and this by-pass switch is in parallel with block filter, and when by-pass switch closes, block filter is bypassed.0 rank circuit is 0 rank reactor L0; The Current Transmit that 1 rank circuit comprises the capacitor C1 of the 1st group of parallel connection and reactor L1 and connects with capacitor C1, reactor L1 respectively
c1, CT
l1; The Current Transmit that 2 rank circuit comprise the capacitor C2 of the 2nd group of parallel connection and reactor L2 and connect with capacitor C2, reactor L2 respectively
c2, CT
l2; The Current Transmit that 3 rank circuit comprise the capacitor C3 of the 3rd group of parallel connection and reactor L3 and connect with capacitor C3, reactor L3 respectively
c3, CT
l3, wherein, CT
c1, CT
c2, CT
c3the current transformer of C1, C2, C3 respectively, CT
l1, CT
l2, CT
l3the current transformer of L1, L2, L3 respectively; In addition, block filter also comprises the Current Transmit with 0 rank circuit, 1 rank circuit, 2 rank circuit and 3 rank circuit connected in series
sBF, this Current Transmit
sBFit is the current transformer of whole block filter.
The circuit structure of block filter protective device is according to an embodiment of the invention described referring to Fig. 4.Identical with Fig. 3, Fig. 4 illustrate only the circuit structure that a phase blocks filter protection device, and the protective device of other phases is identical with the circuit structure shown in Fig. 4.As shown in Figure 4, A phase is blocked filter protection device and is comprised A phase block filter 4, blocks filter coupled corresponding protective relaying device to A phase.According to an embodiment, each protective relaying device is sampled to the electric current of each current transformer (CT) in a corresponding phase block filter, and according to the amplitude of each CT electric current, complete the defencive functions such as time delay overcurrent, when this protective device protection act exports, only the by-pass switch of closed this phase block filter, makes this phase block filter out of service; The action of this phase protection device exports, and the block filter not affecting other phases runs.Described time delay overcurrent protection function; exactly after the current amplitude detected exceedes protection definite value; start timing; in the time delay determined; if the current amplitude detected exceedes protection definite value all the time; then protection act outlet, removes the by-pass switch of this phase block filter closed, makes this phase block filter out of service.According to the protection philosophy described in above-described embodiment, in the circuit structure of described block filter protective device, each protective device is coupled to each current transformer of a corresponding phase block filter and the by-pass switch in parallel with this phase block filter.
According to one embodiment of present invention; described block filter proterctive equipment comprises three-phase block filter and three protective relaying devices altogether; every phase block filter is coupled with corresponding protective relaying device; thus realize defencive function by phase configuration; each protective device action outlet only closes the by-pass switch of the block filter corresponding to this protective device, does not affect the by-pass switch of other phases.
According to one embodiment of present invention, as described in Figure 5, described block filter proterctive equipment also comprises protection screen cabinet, is provided with described three protective relaying devices in described protection screen cabinet.Such as when two or three protective device actions, interlocking action unit trip is shut down.
It should be noted that embodiment proposed by the invention and application are only the object of explanation, not as limiting the scope of the invention, those skilled in the art can modify to meet actual needs to the specific embodiment of the present invention.
Claims (4)
1. a block filter proterctive equipment, is characterized in that:
Described block filter proterctive equipment comprises: heterogeneous block filter, multiple by-pass switch, multiple protective relaying device and protection screen cabinet, wherein:
The quantity of described heterogeneous block filter, described multiple by-pass switch and described multiple protective relaying device is identical;
Each phase block filter in described heterogeneous block filter is all connected in parallel to a different by-pass switch using the by-pass switch as this phase block filter; Each phase block filter is all coupled to a different protective relaying device using the protective relaying device as this phase block filter; The by-pass switch of each phase block filter is coupled to the protective relaying device of this phase block filter; And each phase block filter described all comprises the current transformer of the protective relaying device being coupled to this phase block filter; And
Described multiple protective relaying device is arranged in described protection screen cabinet.
2. block filter proterctive equipment as claimed in claim 1, it is characterized in that, each phase block filter described comprises: the 0 rank circuit be cascaded, 1 rank circuit, 2 rank circuit and 3 rank circuit, and wherein 0 rank circuit is 0 rank reactor L0; The Current Transmit that 1 rank circuit comprises the capacitor C1 of the 1st group of parallel connection and reactor L1 and connects with capacitor C1, reactor L1 respectively
c1, CT
l1; The Current Transmit that 2 rank circuit comprise the capacitor C2 of the 2nd group of parallel connection and reactor L2 and connect with capacitor C2, reactor L2 respectively
c2, CT
l2; The Current Transmit that 3 rank circuit comprise the capacitor C3 of the 3rd group of parallel connection and reactor L3 and connect with capacitor C3, reactor L3 respectively
c3, CT
l3, wherein, CT
c1, CT
c2, CT
c3the current transformer of C1, C2, C3 respectively, CT
l1, CT
l2, CT
l3the current transformer of L1, L2, L3 respectively; In addition, each phase block filter also comprises the Current Transmit with 0 rank circuit, 1 rank circuit, 2 rank circuit and 3 rank circuit connected in series
sBF, this Current Transmit
sBFit is the current transformer of whole block filter;
Each current transformer of each phase block filter is all coupled to the protective relaying device of this phase block filter.
3. block filter proterctive equipment as claimed in claim 1, is characterized in that:
Described heterogeneous block filter is heterogeneous static block filter, and this heterogeneous static block filter is connected between the main transformer high-pressure side of transmission line and ground.
4. the block filter proterctive equipment as described in any one of claim 1-3, is characterized in that:
Described heterogeneous block filter is three-phase block filter, is respectively A phase block filter, B phase block filter and C phase block filter; Described multiple protective relaying device is respectively the first protective relaying device being coupled to A phase block filter, the second protective relaying device being coupled to B phase block filter and is coupled to the 3rd protective relaying device of C phase block filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510391375.XA CN105024347B (en) | 2015-02-12 | 2015-07-07 | Block filter protects equipment |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2015100747160 | 2015-02-12 | ||
| CN201510074716 | 2015-02-12 | ||
| CN201510391375.XA CN105024347B (en) | 2015-02-12 | 2015-07-07 | Block filter protects equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105024347A true CN105024347A (en) | 2015-11-04 |
| CN105024347B CN105024347B (en) | 2019-01-25 |
Family
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Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510391375.XA Active CN105024347B (en) | 2015-02-12 | 2015-07-07 | Block filter protects equipment |
| CN201520483608.4U Withdrawn - After Issue CN205070399U (en) | 2015-02-12 | 2015-07-07 | Block filter protective apparatus |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520483608.4U Withdrawn - After Issue CN205070399U (en) | 2015-02-12 | 2015-07-07 | Block filter protective apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN105024347B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105024347B (en) * | 2015-02-12 | 2019-01-25 | 内蒙古大唐国际托克托发电有限责任公司 | Block filter protects equipment |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3813593A (en) * | 1973-05-04 | 1974-05-28 | Gen Electric | Reduction of turbine generator shaft torques |
| CN101908856A (en) * | 2010-08-27 | 2010-12-08 | 中国电力工程顾问集团华北电力设计院工程有限公司 | Novel block filter |
| CN103107523A (en) * | 2013-01-28 | 2013-05-15 | 大唐国际发电股份有限公司 | Relay protection method of blocking filter mistermination failure |
| CN104020382A (en) * | 2014-06-23 | 2014-09-03 | 国网河北省电力公司衡水供电分公司 | Three-phase portable simulation circuit breaker |
| CN104113045A (en) * | 2014-04-29 | 2014-10-22 | 南京南瑞继保电气有限公司 | Relay protection method of LC parallel circuit detuning faults and device thereof |
| CN205070399U (en) * | 2015-02-12 | 2016-03-02 | 内蒙古大唐国际托克托发电有限责任公司 | Block filter protective apparatus |
-
2015
- 2015-07-07 CN CN201510391375.XA patent/CN105024347B/en active Active
- 2015-07-07 CN CN201520483608.4U patent/CN205070399U/en not_active Withdrawn - After Issue
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3813593A (en) * | 1973-05-04 | 1974-05-28 | Gen Electric | Reduction of turbine generator shaft torques |
| CN101908856A (en) * | 2010-08-27 | 2010-12-08 | 中国电力工程顾问集团华北电力设计院工程有限公司 | Novel block filter |
| CN103107523A (en) * | 2013-01-28 | 2013-05-15 | 大唐国际发电股份有限公司 | Relay protection method of blocking filter mistermination failure |
| CN104113045A (en) * | 2014-04-29 | 2014-10-22 | 南京南瑞继保电气有限公司 | Relay protection method of LC parallel circuit detuning faults and device thereof |
| CN104020382A (en) * | 2014-06-23 | 2014-09-03 | 国网河北省电力公司衡水供电分公司 | Three-phase portable simulation circuit breaker |
| CN205070399U (en) * | 2015-02-12 | 2016-03-02 | 内蒙古大唐国际托克托发电有限责任公司 | Block filter protective apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| CN205070399U (en) | 2016-03-02 |
| CN105024347B (en) | 2019-01-25 |
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