What can this calculator do?

This page is the power-quality hub: it holds no study of its own and sends no engine request. Its six entries route to the pages that own the engine calls — harmonics (the harmonic load flow judged against the IEEE 519 and GB/T 14549-1993 limit tables and the IEC 61000 planning levels), resonance (the Z(f) scan), volt-var optimisation, passive filter design, the PV study group and the DC network. Typical uses: working out where a power-quality question should be answered, and keeping the verdict traceable — every number comes from the page that owns the study, not from a summary invented here.

Why is there no calculation chain on this page?

Because it deliberately owns no study: each of the six subjects has its own page with its own engine switch, and each of those pages describes its own input → engine → output chain. Keeping this page request-free means the hub can never show a number that disagrees with the child page it points to.

Why judge power quality as a package?

Because a scheme can satisfy the voltage and loading limits and still be rejected for distortion or flicker at the point of common coupling. Gathering the subjects in one hub makes the package visible in one place while the numbers themselves stay owned by the pages that compute them.

Power quality & compensation

Harmonics, resonance, capacitor switching and PV DC side

Step 1 of 3Power quality & compensation

Pick a scheme first — then this column can calculate

This column runs the real engine on your project scheme, and there is none yet — that is why no calculation buttons are shown here (they are not broken). Start with any of the ways below; the fastest is the built-in example (one click, real parameters).

① Load a real example scheme (fastest)

10 kV incoming (200 MVA short-circuit level) → 1250 kVA transformer (Dyn11) → LV main switchboard → busbar → 5 feeders plus a fire/emergency ATS branch. 1000 kW calculated load, cosφ 0.85, power-factor target 0.95.

Load the real example scheme and start calculating →

Or pick a ready-made scheme in the scheme library →

The scheme and its parameters go straight into your browser; replace the data with your own at any time.

Calculator mode

Calculator mode computes the few outputs that only depend on parameters you type in yourself. Anything that genuinely needs the whole system (full-network load flow, coupling with other devices) is shown as “needs a scheme” and no number is given.

Calculator mode is not available for this column yet — use one of the ways below.

Nothing is pre-filled and nothing is invented: leave a required field empty and the result area says “unavailable”.

② Or build your own scheme

In the studio, place devices, wire them and pick models — that becomes your project scheme (drawings / BOM / report can be exported).

Open the studio →

Need a hand?

Use the chat bubble bottom-right, or Contact us — we will set the example to your site parameters.

Note: every number comes from the engine. With no scheme, nothing is invented here.

Frequently asked questions

What can this calculator do?: This page is the power-quality hub: it holds no study of its own and sends no engine request. Its six entries route to the pages that own the engine calls — harmonics (the harmonic load flow judged against the IEEE 519 and GB/T 14549-1993 limit tables and the IEC 61000 planning levels), resonance (the Z(f) scan), volt-var optimisation, passive filter design, the PV study group and the DC network. Typical uses: working out where a power-quality question should be answered, and keeping the verdict traceable — every number comes from the page that owns the study, not from a summary invented here.
Why is there no calculation chain on this page?: Because it deliberately owns no study: each of the six subjects has its own page with its own engine switch, and each of those pages describes its own input → engine → output chain. Keeping this page request-free means the hub can never show a number that disagrees with the child page it points to.
Why judge power quality as a package?: Because a scheme can satisfy the voltage and loading limits and still be rejected for distortion or flicker at the point of common coupling. Gathering the subjects in one hub makes the package visible in one place while the numbers themselves stay owned by the pages that compute them.