CN105388383A - SVG-based mobile high-voltage ride-through test device - Google Patents
SVG-based mobile high-voltage ride-through test device Download PDFInfo
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- CN105388383A CN105388383A CN201510919218.1A CN201510919218A CN105388383A CN 105388383 A CN105388383 A CN 105388383A CN 201510919218 A CN201510919218 A CN 201510919218A CN 105388383 A CN105388383 A CN 105388383A
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- svg
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- voltage crossing
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Abstract
The invention relates to an SVG-based mobile high-voltage ride-through test device. The SVG-based mobile high-voltage ride-through test device is characterized in that the high-voltage ride-through test device includes a power source incoming line isolation transformer, a circuit breaker switch, a reactor, an SVG and a distribution line isolation transformer; the high-voltage ride-through test device is installed in containers; the containers are fixed to a transport vehicle; the containers are divided into five different compartments according to functions, namely, a power source incoming line isolation transformer room, a high-voltage switch cabinet, a reactor room, an SVG room and a distribution line isolation transformer room; when the SVG-based mobile high-voltage ride-through test device is used, the primary side of the power source incoming line isolation transformer is connected with a power grid; and the distribution line isolation transformer is connected with photovoltaic equipment. The SVG-based mobile high-voltage ride-through test device is mainly applied to high-voltage tests of photovoltaic inverter devices. According to the SVG-based mobile high-voltage ride-through test device, the vehicle-mounted containers are adopted, so that the SVG-based mobile high-voltage ride-through test device is convenient to transport, and detection and testing can be carried out at any time according to the on-site conditions of the photovoltaic inverters, and requirements of actual work conditions can be satisfied to the greatest extent.
Description
Technical field
The invention discloses a kind of based on SVG packaged type high voltage crossing test unit, be mainly used in the high-voltage test of photovoltaic inversion apparatus.This test unit adopts vehicle-mounted container form, and convenient transportation, can detect at any time according to photovoltaic DC-to-AC converter scene, and test, meets actual condition demand to greatest extent.
Background technology
In recent years, along with the continuous increase with grid-connected installed capacity that widely uses of photovoltaic generating system, its operation under electric network fault condition and control strategy directly have influence on the safe and stable operation of electric system.Existing research mainly concentrates on grid voltage sags fault and probes into the electro-magnetic transient impact analysis of photovoltaic generating system and corresponding low voltage crossing technology, and the correlative study achievement that line voltage corresponding with it rises sharply under condition is then still rare.In fact, in practical power systems, rising sharply of line voltage often occurs along with the falling fault of line voltage, dashes forward to cut etc. can cause rising sharply of line voltage as: the load that grid voltage sags causes.Therefore, be off-grid of avoiding photovoltaic generating system after low voltage crossing because of transient state high pressure, be necessary to be studied its photovoltaic DC-to-AC converter voltage swells control strategy.The decline that photovoltaic generating system combining inverter can be brought to control nargin that rises sharply of line voltage, if out of control, can cause energy to be poured in down a chimney by electrical network and enter inverter and then cause DC side overvoltage or overcurrent.Impact for improving the line voltage transient state caused photovoltaic generating system combining inverter that rises sharply, guarantee that its safety grid-connection runs, this article proposes a kind of photovoltaic DC-to-AC converter voltage swells test macro.
At present, Chinese market access photovoltaic generating system combining inverter only proposes the index of correlation of low voltage crossing, requirement wouldn't be done to high voltage crossing, and the inverter that North America market main flow inverter manufacturer releases is most with high voltage crossing function, along with the development and improvement of domestic photovoltaic power generation technology, possesses the development trend that high voltage crossing function will be photovoltaic generating system combining inverter.
On-the-spot photovoltaic apparatus test in the past adopts the test of low voltage crossing test unit, does not have high voltage crossing test unit.For more abundant Authentication devices, special invention high voltage crossing test unit is met the need of market.
Summary of the invention
The object of this invention is to provide a kind of based on SVG packaged type high voltage crossing test unit, be mainly used in photovoltaic inversion apparatus high-potting.This test unit adopts vehicle-mounted container form, and convenient transportation, can detect at any time according to photovoltaic DC-to-AC converter scene, and test, meets actual condition demand to greatest extent.
For achieving the above object, the present invention is achieved through the following technical solutions:
A kind of based on SVG packaged type high voltage crossing test unit, it is characterized in that, described high voltage crossing testing equipment comprises electric power incoming line isolating transformer, reactor, SVG, allots line isolating transformer, killer switch; High voltage crossing testing equipment is installed in container, and container is fixed on transport vehicle; Container is divided into 5 different compartments according to function, is respectively electric power incoming line isolating transformer room, high-tension switch cabinet room, reactor room, and line isolating transformer room is allotted in SVG room; During use, electric power incoming line isolating transformer primary side connects electrical network, passes through testing equipment, finally allot line isolating transformer and be connected to photovoltaic apparatus through high pressure;
The circuit structure of described high voltage crossing test unit is: comprise electric power incoming line isolating transformer, primary cut-out K1, reactor L, primary cut-out K2, chain type SVG, allot line isolating transformer, described electric power incoming line isolating transformer is connected with primary cut-out K1, primary cut-out K1 connects with reactor L, reactor L with allot line isolating transformer and connect, primary cut-out K2 connects with chain type SVG, then between the isolating transformer series connection point being connected in parallel on reactor L and device being tested, simulating grid high voltage crossing process, test photovoltaic DC-to-AC converter high voltage crossing ability, it is characterized in that, described electric power incoming line isolating transformer secondary side adopts star-connection, neutral-point solid ground, described primary cut-out K2 connects with chain type SVG and adopts star connection, neutral-point solid ground, reactor L and chain type SVG perfect cooperation, the continuous capacitive reactive power utilizing chain type SVG to produce is at the induction reactance X of reactor L
lupper generation voltage drop, the high voltage crossing test realizing photovoltaic DC-to-AC converter that can be accurately stepless.
Before described high voltage crossing test macro drops into test, described primary cut-out K1 disconnects, and primary cut-out K2 disconnects; When starting test, first closed described primary cut-out K1, then closed described primary cut-out K2; When terminating test, first disconnect described primary cut-out K2, then, disconnect described primary cut-out K1.
The induction reactance X of described reactor L
ladopt dry-type air-core reactor, the reactance value X of reactor
lwith the resistance R of reactor
lratio X
l/ R
lshould 10 be greater than; The induction reactance X of reactor L
lbeing fixing, producing the high voltage crossing that different capacitive reactive powers realizes the different amplitude of described photovoltaic DC-to-AC converter, fixing induction reactance X by arranging chain type SVG
lproducing different capacitive reactive power match selection from chain type SVG can make described photovoltaic DC-to-AC converter high voltage crossing test macro within the scope of 100%Un-150%Un, realize step-less adjustment high voltage crossing waveform; Control the time that described chain type SVG produces capacitive reactive power, realize controlling described photovoltaic DC-to-AC converter high voltage crossing time span.
Utilize described chain type SVG characteristic can realize the test of three-phase voltage balance high voltage crossing, also can realize the test of imbalance of three-phase voltage high voltage crossing.
The voltage swells device realizing described high voltage crossing test macro comprises electric power incoming line transformer, high-tension switch cabinet, reactor cabinet, chain type SVG, allots line isolating transformer; Described reactor is induction reactance X
lprimary cut-out K1 is provided with in described high-tension switch cabinet, described primary cut-out K1, K2 choose vacuum circuit breaker, described electric power incoming line isolating transformer Secondary Winding adopts star-connection and neutral-point solid ground, described primary cut-out K2 connects with chain type SVG, wye connection, neutral-point solid ground, described primary cut-out K2, chain type SVG dielectric level should 15KV and more than.
Compared with prior art, the invention has the beneficial effects as follows:
1, this test unit adopts vehicle-mounted container form, and convenient transportation, can detect at any time according to photovoltaic DC-to-AC converter scene, and test, meets actual condition demand to greatest extent.
2, a kind of photovoltaic DC-to-AC converter high voltage crossing experimental provision provided by the invention, electric power incoming line isolating transformer is connected with primary cut-out K1, primary cut-out K1 and induction reactance X
lseries connection, induction reactance X
lwith allot line isolating transformer and connect, primary cut-out K2 connects with chain type SVG and adopts star-star connection and neutral-point solid ground and be connected in parallel on induction reactance X
land allot between line isolating transformer series connection point, test process is by controlling primary cut-out K1 and K2 according to the disconnection of sequential and closed realization, the high voltage crossing that test point produces is identical with the mechanism that actual electric network high voltage crossing produces, the speed of voltage rise and voltage waveform quality thereof are all very identical with actual electric network surge characteristic, actual power network overvoltage characteristic can be produced by real simulation, the high-voltage state simulation of 0.69kV, 10kV and 35kV electric system can be realized.
3, primary cut-out K2 connects with chain type SVG and adopts wye connection and neutral ground, coordinates induction reactance X
lthe voltage of lifting test point.And control chain type SVG three-phase to drop into or phase-splitting drops into the test point voltage three-phase voltage balance lifting or uneven lifting that can make this voltage swells device simultaneously.
Accompanying drawing explanation
Be illustrated in figure 1 the structural drawing of vehicle-mounted container form of the present invention.
Be illustrated in figure 2 the single line schematic diagram of a kind of photovoltaic DC-to-AC converter high voltage crossing device provided by the invention.
Be illustrated in figure 3 the sequential chart that the switch motion of a kind of high voltage crossing device provided by the invention and SVG drop into situation.
Be illustrated in figure 4 the Basic Topological figure of a kind of primary cut-out K2 and chain type SVG provided by the invention.
Be illustrated in figure 5 the schematic layout pattern in a kind of high voltage crossing device provided by the invention practical application.
Be illustrated in figure 6 a kind of photovoltaic DC-to-AC converter high voltage crossing test macro In-situ test provided by the invention and control schematic diagram.
The actual measurement line voltage real-time waveform figure of embodiment when to be illustrated in figure 7 a kind of photovoltaic DC-to-AC converter high voltage crossing test macro provided by the invention be three-phase symmetrical high voltage crossing.
The line voltage effective value oscillogram of embodiment when to be illustrated in figure 8 photovoltaic DC-to-AC converter high voltage crossing test macro provided by the invention be three-phase symmetrical high voltage crossing.
Voltage real-time waveform figure when to be illustrated in figure 9 a kind of photovoltaic DC-to-AC converter high voltage crossing test macro provided by the invention be asymmetrical three-phase high voltage crossing.
Be voltage effective value oscillogram when a kind of photovoltaic DC-to-AC converter high voltage crossing test macro provided by the invention is asymmetrical three-phase high voltage crossing as shown in Figure 10.
Embodiment
With reference to the accompanying drawings the specific embodiment of the present invention is described in further detail below.
See Fig. 1, a kind of based on SVG packaged type high voltage crossing test unit, described high voltage crossing testing equipment comprises electric power incoming line isolating transformer, killer switch, reactor, and SVG allots line isolating transformer; High voltage crossing testing equipment is installed in container, and container is fixed on transport vehicle; Container is divided into 5 different compartments according to function, is respectively electric power incoming line isolating transformer room, high-tension switch cabinet room, reactor room, and line isolating transformer room is allotted in SVG room; During use, electric power incoming line isolating transformer primary side connects electrical network, through high voltage crossing testing equipment, finally allots line isolating transformer and is connected to photovoltaic apparatus.
See Fig. 2, high voltage crossing test unit, its access point connects grid side, and test point connection is tested allots line transformer high-pressure side, simulating grid superpotential tests the high voltage crossing ability of this tested photovoltaic DC-to-AC converter, and the single line schematic diagram of this test macro as shown in Figure 2.As shown in Figure 2, the electric power incoming line transformer 35-10/10kV of this test macro connects with reactor L, then reactor L with allot line isolating transformer 10/0.69kV and connect.
The circuit structure of high voltage crossing test unit comprises electric power incoming line isolating transformer, primary cut-out K1, reactor L, primary cut-out K2, chain type SVG, allot line isolating transformer, described electric power incoming line isolating transformer is connected with primary cut-out K1, primary cut-out K1 connects with reactor L, reactor L with allot line isolating transformer and connect, primary cut-out K2 connects with chain type SVG, then be connected in parallel on reactor L and allot between line isolating transformer series connection point, simulating grid high voltage crossing process, test photovoltaic DC-to-AC converter high voltage crossing ability, described primary cut-out K2 connects with chain type SVG and adopts star connection, neutral-point solid ground, REgulatable reactor L and chain type SVG perfect cooperation, the continuous capacitive reactive power utilizing chain type SVG to produce is at the induction reactance X of reactor L
lupper generation voltage drop, the high voltage crossing test realizing photovoltaic DC-to-AC converter that can be accurately stepless.
Before described high voltage crossing test macro drops into test, described primary cut-out K1 disconnects, and primary cut-out K2 disconnects; When starting test, first closed described primary cut-out K1, then closed described primary cut-out K2; When terminating test, first disconnect described primary cut-out K2, then, disconnect described primary cut-out K1.
Utilize described chain type SVG characteristic both can realize the test of imbalance of three-phase voltage high voltage crossing, also can realize the test of three-phase voltage balance high voltage crossing.
The voltage swells device realizing described high voltage crossing test macro comprises electric power incoming line transformer, high-tension switch cabinet, reactor cabinet, chain type SVG, allots line isolating transformer; Described reactor is induction reactance X
l, be provided with primary cut-out K1 in described high-tension switch cabinet, described primary cut-out K1, K2 choose vacuum circuit breaker, described primary cut-out K2 connects with chain type SVG, wye connection, neutral-point solid ground, described primary cut-out K2, chain type SVG dielectric level should 15KV and more than.
Described photovoltaic DC-to-AC converter high voltage crossing test macro also comprises TT&C system and remote monitoring system on the spot; TT&C system is connected with described high voltage crossing test macro on the spot, and TT&C system and remote monitoring system communicate on the spot; Described TT&C system on the spot, by the information acquisition of system, is carried out realizing high voltage crossing after analysis judges and is controlled, also by network function, voltage swells information is uploaded to outside remote monitoring system.
This high voltage test system can produce actual line voltage and to rise sharply characteristic by real simulation, the high voltage crossing produced is identical with the mechanism that actual electric network superpotential produces, the speed of voltage rise and voltage waveform quality thereof are all very identical with actual electric network high voltage crossing characteristic, and this test macro can realize the high-voltage state simulation of 0.69kV, 10kV and electric system.
Reactor can adopt the reactors such as dry-type air-core reactor, for meeting the test request under the condition that is incorporated into the power networks, reduces photovoltaic DC-to-AC converter active power to the impact of test point voltage magnitude, the reactance value X of the reactance of requirement
lwith the resistance value R of reactor
lratio X
l/ R
l(X
l=ω L) should be the bigger the better (reducing active power to fall at the ohmically electricity of REgulatable reactor), generally should be greater than 10.
The Basic Topological figure of described primary cut-out K2 and chain type SVG as shown in Figure 4, the three-phase branch road mode of connection adopts wye connection, neutral-point solid ground, utilize SVG characteristic to drop into or phase-splitting input simultaneously, the lifting of test point three-phase voltage balance, or the lifting of test point imbalance of three-phase voltage.
The reactance value X of described reactor L
lwith the resistance R of reactor
lratio X
l/ R
lshould 10 be greater than; The induction reactance X of reactor L
lbeing fixing, producing the high voltage crossing that different capacitive reactive powers realizes the different amplitude of described photovoltaic DC-to-AC converter, fixing induction reactance X by arranging chain type SVG
lproducing different capacitive reactive power match selection from chain type SVG can make described photovoltaic DC-to-AC converter high voltage crossing test macro within the scope of 100%Un-150%Un, realize step-less adjustment high voltage crossing waveform; Control the time that described chain type SVG produces capacitive reactive power, realize controlling described photovoltaic DC-to-AC converter high voltage crossing time span.
The actual output performance of existing equipment is described:
(1) test macro is set as three-phase symmetrical high voltage, and high voltage amplitude setting value is 123.5%Un, duration 200ms.As shown in Figure 7, Fig. 8 is the line voltage effective value in corresponding moment to actual measurement line voltage real-time waveform,
(2) test macro is set as asymmetrical three-phase high voltage, and high voltage amplitude setting value is 123.5%Un, duration 200ms.As shown in Figure 9, Figure 10 is the line voltage effective value in corresponding moment to actual measurement line voltage real-time waveform.
Example: this invention is the high voltage crossing test unit based on SVG, and be installed to internal container, high voltage crossing test unit is installed in 2 containers, and 2 containers are respectively 30 chi TEU (Twenty-foot Equivalent Unit)s, convenient transport.Body structure is as shown below: container 1 inside is: electric power incoming line isolating transformer room, high-tension switch cabinet room, reactor room.Container 2 inside is: SVG room, allots line isolating transformer room.2 containers are respectively 30 chi TEU (Twenty-foot Equivalent Unit)s.
Finally should be noted that: above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit, although with reference to above-described embodiment to invention has been detailed description, those of ordinary skill in the field are to be understood that: still can modify to the specific embodiment of the present invention or equivalent replacement, and not departing from any amendment of spirit and scope of the invention or equivalent replacement, it all should be encompassed in the middle of right of the present invention.
Claims (5)
1. based on a SVG container-type high voltage crossing test unit, it is characterized in that, described high voltage crossing testing equipment comprises electric power incoming line isolating transformer, reactor, SVG, isolating transformer, killer switch; High voltage crossing testing equipment is installed in container, and container is fixed on transport vehicle; Container is divided into 5 different compartments according to function, is respectively electric power incoming line transformer room, high-tension switch cabinet room, reactor room, SVG room, isolating transformer room; During use, electric power incoming line inlet wire isolating transformer primary side connects electrical network, passes through testing equipment, finally allot line isolating transformer and be connected to photovoltaic apparatus through high pressure;
The circuit structure of described high voltage crossing test unit is: comprise electric power incoming line isolating transformer, primary cut-out K1, reactor L, primary cut-out K2, chain type SVG, allot line isolating transformer, described electric power incoming line isolating transformer is connected with primary cut-out K1, primary cut-out K1 connects with reactor L, reactor L with allot line isolating transformer and connect, primary cut-out K2 connects with chain type SVG, then be connected in parallel on reactor L and allot between line isolating transformer series connection point, simulating grid high voltage crossing process, test photovoltaic DC-to-AC converter high voltage crossing ability, it is characterized in that, described electric power incoming line isolating transformer secondary side adopts star-connection, neutral-point solid ground, described primary cut-out K2 connects with chain type SVG and adopts star connection, neutral-point solid ground, reactor L and chain type SVG perfect cooperation, the continuous capacitive reactive power utilizing chain type SVG to produce is at the induction reactance X of reactor L
lupper generation voltage drop, the high voltage crossing test realizing photovoltaic DC-to-AC converter that can be accurately stepless.
2. one according to claim 1 passes through test unit based on SVG movable type high-pressure, it is characterized in that, before described high voltage crossing test macro drops into test, described primary cut-out K1 disconnects, and primary cut-out K2 disconnects; When starting test, first closed described primary cut-out K1, then closed described primary cut-out K2; When terminating test, first disconnect described primary cut-out K2, then, disconnect described primary cut-out K1.
3. one according to claim 1 is based on SVG packaged type high voltage crossing test unit, it is characterized in that, the induction reactance X of described reactor L
ladopt dry-type air-core reactor, the reactance value X of reactor
lwith the resistance R of reactor
lratio X
l/ R
lshould 10 be greater than; The induction reactance X of reactor L
lbeing fixing, producing the high voltage crossing that different capacitive reactive powers realizes the different amplitude of described photovoltaic DC-to-AC converter, fixing induction reactance X by arranging chain type SVG
lproducing different capacitive reactive power match selection from chain type SVG can make described photovoltaic DC-to-AC converter high voltage crossing test macro within the scope of 100%Un-150%Un, realize step-less adjustment high voltage crossing waveform; Control the time that described chain type SVG produces capacitive reactive power, realize controlling described photovoltaic DC-to-AC converter high voltage crossing time span.
4. one according to claim 1 is based on SVG packaged type high voltage crossing test unit, it is characterized in that, utilize described chain type SVG characteristic can realize the test of three-phase voltage balance high voltage crossing, also can realize the test of imbalance of three-phase voltage high voltage crossing.
5. one according to claim 1 is based on SVG packaged type high voltage crossing test unit, it is characterized in that, the voltage swells device realizing described high voltage crossing test macro comprises electric power incoming line transformer, high-tension switch cabinet, reactor cabinet, chain type SVG, allots line isolating transformer; Described reactor is induction reactance X
lprimary cut-out K1 and primary cut-out K2 is provided with in described high-tension switch cabinet, described primary cut-out K1, K2 choose vacuum circuit breaker, described electric power incoming line isolating transformer Secondary Winding adopts star-connection and neutral-point solid ground, described primary cut-out K2 connects with chain type SVG, wye connection, neutral-point solid ground, described primary cut-out K2, chain type SVG dielectric level should 15KV and more than.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510919218.1A CN105388383A (en) | 2015-12-10 | 2015-12-10 | SVG-based mobile high-voltage ride-through test device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510919218.1A CN105388383A (en) | 2015-12-10 | 2015-12-10 | SVG-based mobile high-voltage ride-through test device |
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| Publication Number | Publication Date |
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| CN105388383A true CN105388383A (en) | 2016-03-09 |
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ID=55420881
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| CN201510919218.1A Pending CN105388383A (en) | 2015-12-10 | 2015-12-10 | SVG-based mobile high-voltage ride-through test device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112840549A (en) * | 2019-09-02 | 2021-05-25 | 东芝三菱电机产业系统株式会社 | Testing device for inverter device |
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| CN103454584A (en) * | 2013-08-22 | 2013-12-18 | 北京金风科创风电设备有限公司 | High voltage ride through test equipment for wind generating set |
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| CN112840549A (en) * | 2019-09-02 | 2021-05-25 | 东芝三菱电机产业系统株式会社 | Testing device for inverter device |
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Application publication date: 20160309 |