CN203734324U - Grid-connected control system for tri-generation system - Google Patents
Grid-connected control system for tri-generation system Download PDFInfo
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- CN203734324U CN203734324U CN201320690497.5U CN201320690497U CN203734324U CN 203734324 U CN203734324 U CN 203734324U CN 201320690497 U CN201320690497 U CN 201320690497U CN 203734324 U CN203734324 U CN 203734324U
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Abstract
The utility model discloses a grid-connected control system for a tri-generation system. The system comprises a mains supply bus, generators, a load, a switch, a master control PLC, and a grid-connected PLC. The switch selects to connect one of the generators to the mains supply bus to supply the load with power. The master control PLC controls the generators to start and stop by means of a relay array control cabinet. The grid-connected PLC follows a control logic set by the master control PLC to automatically control the switch to conduct grid connection selection. The system further comprises a monitoring host for remotely controlling the master control PLC. The master control PLC is provided with a touch screen for setting system control logic. The system has only a small impact to a mains power grid during grid-connected power generation, provides technical support for achieving safe and reliable grid connection, and thus has a broad application prospect.
Description
Technical field
The present invention relates to civilian electric power supply technique field, specifically refer to a kind of grid-connection control system for combined supply system.
Background technology
" three alliances " is again distributed energy supply, uses natural gas power, then the waste heat producing with generating, to building heat supply or cooling, makes energy cascade utilization.This is equivalent to " power plant " to be built to enterprise " doorway ", especially in hotel, large electricity consumer's periphery such as hospital, office building, factory building, generating efficiency can improve more than 70%, waste heat energy meets the multiple demands such as people's refrigeration, heating, domestic hot-water, steam simultaneously.Day by day deficient and national to the policy support of the economizing type energy at traditional energy, combined supply system has good market prospects.In combined supply system and an important ring be exactly to realize system and network grid-connected power.
Summary of the invention
For above the deficiencies in the prior art, the invention provides for a kind of for the grid-connection control system of combined supply system, 2 cover PLC and touch-screen are set and carry out grid-connected logic control, gather generating set service data, realize the demonstration on the spot of switch running status, generating set data and fault message, reduce combined supply system impact to utility grid in the time generating electricity by way of merging two or more grid systems, for the safe and reliable grid-connected technical guarantee that provides is provided, be with a wide range of applications.
Realize above-mentioned purpose, the invention provides a kind of grid-connection control system for combined supply system, comprise the grid-connected PLC that civil power bus, generator, load, selection are connected the switch of generator and civil power bus powering load, carried out grid-connected selection by the main control PLC of relay array control cubicle control generator start and stop, according to the control logic automatic control switch of main control PLC setting.
In above-mentioned control system: described main control PLC is provided with touch-screen.
The grid-connection control system of above-mentioned combined supply system also comprises monitoring host computer, for Long-distance Control main control PLC.
Above-mentioned grid-connection control system, described generator has two, is connected to civil power bus by parallel way.
Above-mentioned grid-connection control system, described main control PLC is connected with relay array communication by bus.
Above-mentioned grid-connection control system, described switch is automatic circuit breaker.
Above-mentioned grid-connection control system, described switch comprises that being connected to the engine circuit breaker of generator both sides and switch, the grid-connected circuit breaker of civil power bus, the engine cluster engine after is side by side linked into isolation circuit breakers and the cluster engine circuit breaker on bus.
The invention has the advantages that: (1) can freely select the generating that whether is connected to the grid according to region energy supply situation, nimbly and freely; (2) realize energy cascade utilization, improve energy utilization rate, accord with the demands of the market; (3) adopt PLC Based Intelligent Control, operation information shows on the spot, safe and reliable.Control system of the present invention is supported two kinds of control modes: control on the spot and distant place control, be applicable to medium-and-large-sized, require directly in background monitoring chamber directly controlled occasion, reduce manually on duty, and can be according to region situation, whether and operational mode the operation of the selection generating set of intelligence automatically.Background monitoring center can monitor unit operation situation intuitively, issuing control order flexibly.
Brief description of the drawings
Fig. 1 is the grid-connection control system of combined supply system;
Wherein 1.UM (the grid-connected circuit breaker of civil power bus), 2. load switch, 3. load, 4.GM (cluster engine circuit breaker), 5.GL (isolation circuit breakers), 6. the first generator circuit breaker, 7. the first engine, 8. the second generator circuit breaker, 9. the second engine, 10. resistance.
Embodiment
Contrast accompanying drawing below, by the description to embodiment, the specific embodiment of the present invention is as the effect of the mutual alignment between the shape of related each member, structure, each several part and annexation, each several part and operation principle, manufacturing process and operation using method etc., be described in further detail, to help those skilled in the art to have more complete, accurate and deep understanding to inventive concept of the present invention, technical scheme.
As shown in Figure 1, the grid-connection control system of combined supply system comprises the grid-connected PLC that civil power bus, generator, load, selection are connected the switch of generator and civil power bus powering load, carried out grid-connected selection by the main control PLC of relay array control cubicle control generator start and stop, according to the control logic automatic control switch of main control PLC setting, main control PLC is provided with touch-screen, this system also comprises monitoring host computer, for Long-distance Control main control PLC.Wherein generator has two, is connected to civil power bus by parallel way.Main control PLC is connected with relay array communication by bus.Above-mentioned switch is automatic circuit breaker, comprises that being connected to the engine circuit breaker of generator both sides and switch, the grid-connected circuit breaker of civil power bus, the engine cluster engine after is side by side linked into isolation circuit breakers and the cluster engine circuit breaker on bus.
Control system is taking two generating sets as one group, according to grid-connected electric power system and the grid-connected online electric power system of not surfing the Net of the interior transformer composition in 4 kinds of different operational modes and station.Present mode of operation can be selected or by the long-range setting of monitoring host computer on main control PLC touch-screen, after selected operational mode, grid-connected master control cabinet (grid-connected PLC) will carry out grid-connected control automatically according to the control logic of setting, and its control procedure needn't rely on monitoring host computer and communication network.4 kinds of different operational mode control logics are as follows:
Operational mode 1 (grid-connected do not surf the Net):
The closed station internal burden of giving of UM is powered, and bus connection switch TIE is in withdrawn position, and generating set exports isolating switch GL closure.Generating set starts after receiving the enabling signal of being sent by master control cabinet automatically, and automatic synchronization after generating set starts, signals to master control cabinet after synchronously completing.Master control cabinet arranges according to " manually grid-connected " or " auto-parallel " set after receiving synchronous settling signal, provide respectively and allow manual grid-connected signal to wait for manually grid-connected or automatic closed generating set gate out switch G1, G2, and complete and being incorporated into the power networks of civil power by GM.This pattern is grid-connectedly not surf the Net, and institute's electricity is by personal in energy source station.The actual load size that generating set detects according to system automatically regulator generator load output equals 90% of actual load size, and other 10% load, by commercial power supply, so just can ensure to generate electricity and can not arrive and be poured into civil power, and carry out load management.
Operational mode 2 (island mode):
UM disconnects station internal burden power supply, and bus connection switch TIE is in withdrawn position, and generating set exports isolating switch GL closure.Generating set starts after receiving the enabling signal of being sent by master control cabinet automatically, and automatic synchronization after generating set starts, signals to master control cabinet after synchronously completing.Master control cabinet arranges according to " manually grid-connected " or " auto-parallel " set after receiving synchronous settling signal, and provide respectively and allow manual grid-connected signal to wait for manually grid-connected or automatic closed generating set gate out switch G1, G2, and by GM powering load.This pattern is island mode, and institute's electricity is by personal in energy source station.The actual load size regulator generator load output automatically that generating set detects according to system.And carry out load management.
Operational mode 3 (the outer grid-connected online of standing):
Through change over switch by the generating busbar conversion outer feeder ear that arrives at a station.Generating set starts after receiving the enabling signal of being sent by master control cabinet automatically, and automatic synchronization after generating set starts, signals to master control cabinet after synchronously completing.Master control cabinet receives after synchronous settling signal and arranges according to " manually grid-connected " or " auto-parallel " set, provides respectively and allows manual grid-connected signal to wait for that manual grid-connected or automatic closed generating set gate out switch GM completes and being incorporated into the power networks of civil power.If city's electro-mechanical wave or power-off detected in service, disconnect UM by master control cabinet.After city power recovery is normal, disconnect Generator Outlet Switchgear GM but generator is not shut down through certain time-delay master control cabinet, closed UM, signals to master control cabinet after again being synchronizeed with civil power by generating set, and after master control cabinet is received synchronous settling signal, closed GM completes with civil power grid-connected.This pattern is grid-connected online, and by Zhan Wai civil power, outer net sale of electricity is directly gone up by transformer station.Generating set should be fixed within the scope of 95% rated power and generate electricity according to system command.
Operational mode 4 (grid-connected online in standing):
The closed station internal burden of giving of UM is powered. and generating set starts after receiving the enabling signal of being sent by master control cabinet automatically, and automatic synchronization after generating set starts, signals to master control cabinet after synchronously completing.After master control cabinet is received synchronous settling signal, automatic closed generating set gate out switch GM completes 2 parallel machine operations.After parallel running completes, master control cabinet can be according to the significance level of load according to progressively connecting system of certain time interval, avoids the impact that simultaneously adds, and load classification is temporarily by 4 grades of distribution.
By reference to the accompanying drawings the present invention is exemplarily described above; obviously specific implementation of the present invention is not subject to the restrictions described above; as long as adopted the improvement of the various unsubstantialities that method of the present invention design and technical scheme carry out; or without improving, design of the present invention and technical scheme are directly applied to other occasion, all within protection scope of the present invention.
Claims (6)
1. for a grid-connection control system for combined supply system, it is characterized in that: comprise the grid-connected PLC that civil power bus, generator, load, selection are connected the switch of generator and civil power bus powering load, carried out grid-connected selection by the main control PLC of relay array control generator start and stop, according to the control logic automatic control switch of main control PLC setting.
2. the grid-connection control system for combined supply system according to claim 1, is characterized in that: described main control PLC is provided with touch-screen.
3. the grid-connection control system for combined supply system according to claim 1, is characterized in that: this system also comprises monitoring host computer, for Long-distance Control main control PLC.
4. the grid-connection control system for combined supply system according to claim 1, is characterized in that: described generator has two, is connected to civil power bus by parallel way.
5. the grid-connection control system for combined supply system according to claim 1, is characterized in that: described main control PLC is connected with relay array by bus.
6. the grid-connection control system for combined supply system according to claim 1, is characterized in that: described switch is automatic circuit breaker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320690497.5U CN203734324U (en) | 2013-11-04 | 2013-11-04 | Grid-connected control system for tri-generation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320690497.5U CN203734324U (en) | 2013-11-04 | 2013-11-04 | Grid-connected control system for tri-generation system |
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| Publication Number | Publication Date |
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| CN203734324U true CN203734324U (en) | 2014-07-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320690497.5U Expired - Fee Related CN203734324U (en) | 2013-11-04 | 2013-11-04 | Grid-connected control system for tri-generation system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103580062A (en) * | 2013-11-04 | 2014-02-12 | 安徽鑫龙电器股份有限公司 | Grid-connected control system used for triple co-generation system |
-
2013
- 2013-11-04 CN CN201320690497.5U patent/CN203734324U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103580062A (en) * | 2013-11-04 | 2014-02-12 | 安徽鑫龙电器股份有限公司 | Grid-connected control system used for triple co-generation system |
| CN103580062B (en) * | 2013-11-04 | 2016-08-17 | 安徽中电兴发与鑫龙科技股份有限公司 | Grid-connection control system for combined supply system |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140723 Termination date: 20161104 |